Answer:
1.82 atm
Explanation:
Ideal gas law
P=nRT/V
1) solve for n which is moles
7.16 / 4 = 1.79 mole He
2)
n=1.79
R=0.0821
T=692 K
V=55.9
P=1.79 X 0.0821 X 692 / 55.9 =1.82 atm
We know that Paz is trying to produce ammonia (NH3) from thin air. From looking at the experimental set-up, what are the reactants? a) NO2 and H20 b) N2 and H2 c) NO2 and H2 d) N2 and H20
To produce ammonia (NH₃) from thin air, the reactants required are N₂ and H₂. So the correct option is b).
Give a brief account on production of ammonia.Ammonia is one of the most abundantly produced inorganic chemicals. In 2016, there are a number of large ammonia plants around the world that produced a total of 144 million tons of nitrogen (equivalent to 175 million tons of ammonia). That number will rise to 235 million tonnes of ammonia in 2021. China produced 31.9% of its global production, followed by Russia at 8.7%, India at 7.5% and the United States at 7.1%. More than 80% of the ammonia produced is used as fertilizer for agricultural crops.
Today, most ammonia is produced on a large scale using the Haber process, with capacities of up to 3,300 tons per day. Gases N₂ and H₂ are reacted at a pressure of 200 bar. A typical modern ammonia production plant first converts natural gas, LPG, or petroleum gas into gaseous hydrogen. The process of producing hydrogen from hydrocarbons is known as steam reforming. Hydrogen then combines with nitrogen to produce ammonia by the Haber-Bosch process.
One way to produce green ammonia is to use hydrogen from the electrolysis of water and nitrogen separated from air. These are fed into the Haber Process (aka Haber-Bosch), all of which produce sustainable power.
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If this sample “unlabelled graph” were used from this experiment - how could we label each portion of the graph? What type of relationship do we see?
Typically, you must identify the x- and y-axes, which represent the two variables being measured or compared, in order to label a graph.
How can you identify Variables in graph?The graph's shape must be examined in order to determine the type of relationship between the variables. The relationship is considered to be linear if the graph depicts a straight line. The relationship is non-linear if the graph shows a curve. To determine whether the relationship is positive or negative, you would also need to look at the line's slope and direction. The relationship is positive if the line slopes upwards from left to right; this indicates that as one variable rises, so does the other. The relationship is negative if the line slopes downward from left to right, indicating that one variable increases while the other decreases.
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given the atomic mass of hydrogen is 1 amu, the atomic mass of oxygen is 16 amu, and one molecule of sulfuric acid has a mass of 98 amu, what is the atomic mass of sulfur trioxide?
The atomic mass of sulfur trioxide (SO3) is 82 amu.
How to find the atomic mass of sulfur trioxide ?Sulfur trioxide (SO3) has one sulfur atom and three oxygen atoms.
The atomic mass of sulfur can be calculated by subtracting the total mass of the oxygen atoms in sulfuric acid (3 x 16 amu) from the mass of sulfuric acid (98 amu) and then subtracting the mass of the remaining oxygen atom:
Mass of sulfur = (98 amu - 3 x 16 amu) - 1 x 16 amuMass of sulfur = (98 amu - 48 amu) - 16 amuMass of sulfur = 34 amuThe atomic mass of sulfur is 34 amu.
To find the atomic mass of sulfur trioxide, we add the atomic masses of one sulfur atom and three oxygen atoms:
Atomic mass of SO3 = 1 x 34 amu + 3 x 16 amuAtomic mass of SO3 = 34 amu + 48 amuAtomic mass of SO3 = 82 amuTherefore, the atomic mass of sulfur trioxide (SO3) is 82 amu.
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What is the meaning of friction
Explanation: the resistance that one surface or object encounters when moving over another.
or
the action of one surface or object rubbing against another.
Answer: a force that resists the motion of one object against another
There are two naturally occurring isotopes of uranium. Uranium-238 and uranium-235. Uranium-238 has a percent abundance of 99.7% uranium-235 had a percent abundance of 0.3%. What is the atomic mass of uranium?
The atomic mass of uranium would be approximately 238.453 u.
Atomic mass calculationTo calculate the atomic mass of uranium, we need to take into account the percent abundance and mass of each isotope.
The atomic mass of an element is calculated by taking the weighted average of the masses of each isotope, where the weighting factor is the percent abundance of each isotope.
Let's begin by calculating the contribution of each isotope to the atomic mass of uranium:
Uranium-238 (238.050788 u): 99.7% abundanceUranium-235 (235.043929 u): 0.3% abundanceTo calculate the atomic mass, we can multiply the mass of each isotope by its percent abundance (in decimal form), and then add the products together:
Atomic mass of uranium = (238.050788 u x 0.997) + (235.043929 u x 0.003)
Atomic mass of uranium = 237.748013 u + 0.705132 u
Atomic mass of uranium = 238.453 u
Therefore, the atomic mass of uranium is approximately 238.453 u.
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Conclusions
1. What conclusions can you draw about how temperature and salinity affect the flow of water Write an
evidence-based claim
Type your answer here:
I
2. Draw a diagram (develop a model) that shows what happens when warm water mixes with cold water in the
ocean. Use your model to explain how this causes ocean currents.
Type your answer here:
1. Temperature and salinity affect the flow of water in the ocean by creating density differences that drive ocean currents.
2. [image of warm and cold water mixing and creating a convection cell is mentioned below]
When warm water mixes with cold water in the ocean, a convection cell forms. Warm water rises and cold water sinks, which drives ocean currents. This process is influenced by other factors such as wind, Earth's rotation, and the shape of ocean basins.
What is density?
Density refers to the amount of mass per unit volume of water. At standard conditions (temperature of 4 degrees Celsius and pressure of 1 atmosphere), the density of pure water is approximately 1 gram per cubic centimeter (g/cm³). However, the density of water can vary depending on its temperature and salinity.
What is convection cell?
A convection cell is a circular pattern of fluid movement that arises when warm fluid rises and cold fluid sinks in a circular motion, creating a loop or cell. In the context of oceanography, convection cells can be formed when warm water rises and cold water sinks, either due to differences in temperature or salinity.
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How many grams of copper(II) sulfate pentahydrate (CuSO 4 ⋅5H 2 O) are needed to prepare 100.00 milliliters of a 0.12M copper(II) sulfate solution?
Answer:2.5 g CuSO4⋅5H2O.
Explanation:
You're dealing with copper(II) sulfate pentahydrate,
CuSO
4
⋅
5
H
2
O
, an ionic compound that contains water of crystallization in its structure.
More specifically, you have five moles of water of crystallization for every one mole of anhydrous copper(II) sulfate. This means that you're going to have to account for the mass of this water of crystallization in your calculations.
Now, you need your target solution to have a molarity of
0.10 M
and a volume of
100. mL
. Since molarity is defined as moles of solute per liter of solution, you can say that the target solution must contain
What is the experimental mole ratio of baking soda (NaHCO3 ) to sodium chloride (NaCl)?
Answer: 1:1
Explanation:
Since Na trades place with Na it makes it 1:1
Use the following data to determine whether the conversion of diamond into graphite is exothermic or endothermic:
C diamond (s) + O2 (g) ? CO2(g) ?H° = -395.4 kJ
2 CO2 (g) ? 2 CO(g)+O2 (g) ?H° = 566.0 kJ
2 CO2(g) ? Cgraphite(s) + CO2 (g) ?H° =-172.5 kJ
Cdiamond (s) ? Cgraphie (s) ?H°= ?
It's a negative value for ∆H°, indicating that the conversion of diamond to graphite releases energy. As a result, it is an exothermic reaction.
The conversion of diamond into graphite is exothermic. The enthalpy change of the reaction is -267.1 kJ.There are three reactions that take place in this process. Cdiamond (s) + O2 (g) → CO2(g) ∆H° = -395.4 kJ2 CO2 (g) → 2 CO(g)+O2 (g) ∆H° = 566.0 kJ2 CO2(g) → Cgraphite(s) + CO2 (g) ∆H° =-172.5 kJCdiamond (s) → Cgraphite (s) ∆H°= ?
The conversion of diamond to graphite is an endothermic process. It has a positive value of ∆H°. Therefore, the heat is absorbed by the surroundings. According to the first two reactions, the formation of CO and CO2 from the combustion of diamonds produces energy.
The net reaction for the conversion of diamond to graphite takes place as follows:
Diamond (s) + 2 O2(g) → Cgraphite (s) + 2 CO2 (g)
The energy change for this reaction can be determined by combining the above three reactions. The enthalpy change is obtained by subtracting the sum of the enthalpies of the reactants from the sum of the enthalpies of the products. The enthalpy change of the reaction is calculated as follows:
∆H°=ΣH°(products)−ΣH°(reactants)
∆H°=(−172.5)+(2×−393.5)+(566.0)−[(0)+(0)+(-395.4)+(2×0)]
∆H°=−267.1 kJ
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the electron configuration of nitrogen is 1s^2 2s^2 2p^3. how many electrons are present in an atom of nitrogen? what is the atomic number for nitrogen?
Since the electronic configuration of nitrogen is 1s² 2s² 2p³, the number of electrons present in the nitrogen atom is 7, and the atomic number of nitrogen is also seven (7).
The atomic number of an atom is the number of protons in the nucleus of an atom. The number of protons defines the properties of an element. For example, if an element with 5 protons is boron atom.
The electronic configuration of an atom represents the number of electrons in each sub-energy level of the atom in the ground state.
The electronic configuration of nitrogen is 1s²2s²2p³. As you know, the electrons around the nucleus are located in energies or levels. Therefore, from the definition of electron configuration, we can say that the nitrogen atom has 2 electrons in the first energy level K of the s-subshell, and in the s-subshell and the p subshell of the second energy level L, respectively There are 2 or 3 electrons.
Therefore, the total number of electrons in the nitrogen atom is 7 (2 + 2 + 3). We know that the number of protons = the number of electrons, so the number of protons in the nitrogen nucleus is 7. Therefore, the nitrogen atom has an atomic number of 7.
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or the substituted cyclohexane compound shown, identify the atoms that are cis to the hydroxyl (oh) substituent.
The atoms that are cis to the hydroxyl (OH) substituent are the two carbon atoms in the ring that are directly adjacent to the OH group.
Cis-trans isomerism is a word used in chemistry that refers to the spatial arrangement of atoms within molecules. It is also known as geometric isomerism or configurational isomerism. The Latin prefixes "cis" and "trans" mean, respectively, "this side of" and "the other side of." Trans conveys that the functional groups (substituents) are on the opposite (transverse) sides of some plane, whereas cis implies that they are on the same side of some plane in the context of chemistry.
Cis-trans isomers are examples of stereoisomers, which are pairs of molecules with the same formula but distinct functional groups oriented in three dimensions. The absolute stereochemical explanation of E-Z isomerism does not necessarily equate to cis-trans notation.
The hydroxyl group (-OH) is attached to carbon number 1. The cis atoms are those that are attached to the same side of the ring. There are two atoms that are cis to the hydroxyl (OH) substituent, and these are atoms number 2 and 3. Therefore, the atoms that are cis to the hydroxyl (OH) substituent are atoms number 2 and 3 .
Thus, the cis to the hydroxyl (OH) is (B) 2 and 3.
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Draw a Lewis structure that obeys the octet rule for each of the following molecules and ions. In each case the first atom listed is the central atom.
a. POCl3, SO42−, XeO4, PO43−, ClO4−
b. NF3, SO32−, PO33−, ClO3−
c. ClO2−, SCl2, PCl2−
To draw a Lewis structure that obeys the octet rule for each of the molecules and ions listed, simply follow the steps outlined above and make sure that each atom has a formal charge of zero or close to zero.
For each of the molecules and ions listed, you can draw a Lewis structure that obeys the octet rule by following these steps:
1. Identify the central atom: The first atom listed in each molecule or ion is the central atom.
2. Count the number of valence electrons: Each atom has a certain number of valence electrons based on its position in the periodic table.
3. Form single bonds: Make single bonds between the central atom and each of the other atoms to use up the available valence electrons.
4. Add lone pairs: If the central atom still has electrons remaining, add lone pairs to satisfy the octet rule.
5. Check the formal charges: Make sure all atoms have formal charges of zero or close to zero.
Let's look at each molecule and ion individually:
a. POCl3, SO42−, XeO4, PO43−, ClO4−:
POCl3: The central atom is phosphorus (P) and it has 5 valence electrons. We form single bonds between the P atom and each of the other atoms, giving P a total of 8 electrons. The formal charge of each atom is zero.
SO42−: The central atom is sulfur (S) and it has 6 valence electrons. We form single bonds between the S atom and each of the other atoms, giving S a total of 8 electrons. The formal charge of each atom is zero.
XeO4: The central atom is xenon (Xe) and it has 8 valence electrons. We form single bonds between the Xe atom and each of the other atoms, giving Xe a total of 8 electrons. The formal charge of each atom is zero.
PO43−: The central atom is phosphorus (P) and it has 5 valence electrons. We form single bonds between the P atom and each of the other atoms, giving P a total of 8 electrons. The formal charge of each atom is zero.
ClO4−: The central atom is chlorine (Cl) and it has 7 valence electrons. We form single bonds between the Cl atom and each of the other atoms, giving Cl a total of 8 electrons. The formal charge of each atom is zero.
b. NF3, SO32−, PO33−, ClO3−:
NF3: The central atom is nitrogen (N) and it has 5 valence electrons. We form single bonds between the N atom and each of the other atoms, giving N a total of 8 electrons. The formal charge of each atom is zero.
SO32−: The central atom is sulfur (S) and it has 6 valence electrons. We form single bonds between the S atom and each of the other atoms, giving S a total of 8 electrons. The formal charge of each atom is zero.
PO33−: The central atom is phosphorus (P) and it has 5 valence electrons. We form single bonds between the P atom and each of the other atoms, giving P a total of 8 electrons. The formal charge of each atom is zero.
ClO3−: The central atom is chlorine (Cl) and it has 7 valence electrons. We form single bonds between the Cl atom and each of the other atoms, giving Cl a total of 8 electrons. The formal charge of each atom is zero.
c. ClO2−, SCl2, PCl2−:
ClO2−: The central atom is chlorine (Cl) and it has 7 valence electrons. We form single bonds between the Cl atom and each of the other atoms, giving Cl a total of 8 electrons. The formal charge of each atom is zero.
SCl2: The central atom is sulfur (S) and it has 6 valence electrons. We form single bonds between the S atom and each of the other atoms, giving S a total of 8 electrons. The formal charge of each atom is zero.
PCl2−: The central atom is phosphorus (P) and it has 5 valence electrons. We form single bonds between the P atom and each of the other atoms, giving P a total of 8 electrons. The formal charge of each atom is zero.
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1. What volume of hydrogen gas at STP is produced from the
reaction of 50.0g of Mg and 75.0 grams of HCl? How much
of the excess reagent is left over (in grams)?
Answer:
1.03 mol of dihydrogen gas will evolve, with a volume slightly over 22.4 dm3 at ST P. Explanation: Moles of magnesium: 50.0 ⋅ g 24.31 ⋅ g ⋅ mol−1 = 2.06 mol Moles of hydrogen chloride gas: 75.0 ⋅ g 36.2⋅ g ⋅ mol−1 = 2.07 mol
Explanation:
HOPE THAT HELPS ! <3
How can we use liquid nitrogen? What are the purposes of using liquid nitrogen?
Answer:
Liquid nitrogen can be used to freeze biological tissue. Liquid nitrogen is -210°C which will stop all biological decomposition in the tissue and preserve it.
Explanation:
Consider the reaction between aqueous solutions of potassium hydroxide and chromium (III) chloride. Based on your balanced equation for this reaction, answer the following questions: 1) What are the spectator ions in this reaction? and 2) What is the formula for the precipitate formed in this reaction? 3) What is the sum of all the coefficients in the net ionic equation for this reaction? Net lonic Equati....pdf Hydrocarbon C....pdf
The net ionic equation for the given reaction is: 1 Cr3+(aq) + 3OH-(aq) → Cr(OH)3(s)
2. The formula for the precipitate formed in this reaction is Cr(OH)3.
3. The sum of all coefficients in the net ionic equation is 4.
Consider the reaction between aqueous solutions of potassium hydroxide and chromium (III) chloride. The balanced chemical equation for the given reaction is:KOH(aq) + CrCl3(aq) → KCl(aq) + Cr(OH)3(s)1) Spectator ionsThe ions that do not take part in the reaction are known as spectator ions.
These ions are present on both sides of the equation without undergoing any chemical changes.The ionic equation for the given reaction is:3K+(aq) + 3OH-(aq) + Cr3+(aq) + 3Cl-(aq) → 3K+(aq) + 3Cl-(aq) + Cr(OH)3(s)The spectator ions are K+ and Cl-.2)
PrecipitateThe precipitate is formed when the two reactants are combined together, and it can be identified from the ionic equation. In this reaction, the precipitate is formed when KOH is added to the aqueous solution of chromium(III) chloride.The formula for the precipitate formed in this reaction is Cr(OH)3.3) Sum of all coefficientsThe net ionic equation represents the actual chemical change occurring in the reaction.
The spectator ions are removed, and only the ions that participate in the reaction are shown. The net ionic equation for the given reaction is:Cr3+(aq) + 3OH-(aq) → Cr(OH)3(s)The sum of all coefficients in the net ionic equation is 4.
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based on solubility rules, could you use fe(no3)3 rather than agno3 to determine the percent chloride in the unkown
No. According to solubility rule, we cannot use the Fe(NO3)3 rather than AgNO3 via analysis of precipitate of AgCl because no precipitate of cl- ion formed in Fe(NO3)3 .
A solubility chart having solubility rules is defined as a chart describing for different combinations of cations and anions whether the ionic compounds formed dissolve in or precipitate from a solution. This chart shows the solubility of various common ionic compounds in water, at a pressure of 1 atm. and under room temperature.
The following reactions are involved to determine Cl- concentration,
Case 1: Fe(NO3)3 (aq.) + Cl-(aq.) ----> FeCl3(aq.) + NO3-(aq.).
In this reaction involving aqueous solution of Fe(NO3)3 no precipitate of Cl- ion compound is formed .so this we can not use Fe(NO3)3 to determine %Cl- ion in solution.
Case 2 :
AgNO3(aq.) + Cl- (aq.) ---> AgCl(precipitate) + NO3-.
This reaction involving aqueous solution of AgNO3 can be use to determine %Cl- ion concentration in solution via analysis of precipitate of AgCl .
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Which is an example of Conduction?
A Warm air rising, cooling at high temperatures, and then falling back to lower elevations.
B Warming your hands by a fire.
C The sun warming your face
D Burning your mouth on a hot spoon
Burning your mouth on a hot spoon(option D) is an example of heat transfer through conduction, as the spoon is in direct contact with your mouth.
What is conduction?Conduction is the transfer of heat or electrical energy between two objects that are in direct contact with each other, or between two parts of the same object that are at different temperatures.
In conduction, the energy transfer occurs due to the collision of molecules in the objects or materials. When two objects are in contact, the molecules of the warmer object vibrate more rapidly, colliding with the molecules of the cooler object, which have less energy.
These collisions transfer thermal energy from the warmer object to the cooler object, until both objects reach the same temperature.
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a 0.100 mole sample of ethane, c2h6, contains which of these? hint: how many atoms are present in one c2h6 molecule?
0.100 mole sample of ethane contains approximately 1.204 x [tex]10^{24}[/tex] carbon atoms and 3.612 x [tex]10^{24}[/tex] hydrogen atoms.
What are the atoms?
In one molecule of ethane (C2H6), there are 2 carbon atoms and 6 hydrogen atoms.
To determine how many atoms are present in a 0.100 mole sample of ethane, we can use Avogadro's number, which relates the number of particles (in this case, molecules) to the amount of substance in moles. Avogadro's number is approximately 6.02 x [tex]10^{23}[/tex] particles per mole.
So, a 0.100 mole sample of ethane would contain:
0.100 x 6.02 x [tex]10^{23}[/tex]molecules of ethane2 x 0.100 x 6.02 x [tex]10^{23}[/tex] carbon atoms (since each ethane molecule contains 2 carbon atoms)6 x 0.100 x 6.02 x [tex]10^{23}[/tex] hydrogen atoms (since each ethane molecule contains 6 hydrogen atoms)Simplifying this expression, we get:
6.02 x [tex]10^{22}[/tex] molecules of ethane1.204 x [tex]10^{24}[/tex]carbon atoms (2 x 6.02 x [tex]10^{22}[/tex])3.612 x [tex]10^{24}[/tex] hydrogen atoms (6 x 6.02 x [tex]10^{22}[/tex])Therefore, a 0.100 mole sample of ethane contains approximately 1.204 x [tex]10^{24}[/tex] carbon atoms and 3.612 x [tex]10^{24}[/tex] hydrogen atoms.
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Using C2H4 + 3 O2 -> 2 CO2 + 2 H2O.
What is the limiting reactant for this equation based on the previous question?
There is no limiting reactant because both reactants produce the same amount of products indicating that neither reactant is in excess and both are fully consumed in the reaction.
What is a limiting reactant?The limiting reagent is described as the reactant that is completely used up in a reaction, and thus determines when the reaction stops.
calculating the number of moles of each reactant of the equation:
C2H4 + 3 O2 -> 2 CO2 + 2 H2O.
Moles of C2H4: not given, assume 1 mole
Moles of O2: 3 moles (given in the equation)
Moles of CO2 produced by 1 mole of C2H4: 2 moles (from the balanced equation)
Moles of H2O produced by 1 mole of C2H4: 2 moles (from the balanced equation)
Moles of CO2 produced by 3 moles of O2: 2 x 3/3 = 2 moles (from the balanced equation)
Moles of H2O produced by 3 moles of O2: 2 x 3/3 = 2 moles (from the balanced equation)
In conclusion, both reactants produce the same amount of products (2 moles of CO2 and 2 moles of H2O).
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1. Choose the atom with the larger first ionization energy.
Select one:
a. Titanium
b. Manganese
2. Choose the atom with the larger first ionization energy.
Select one:
a. Silicon
b. Tin
The atom with the larger first ionization energy is Titanium. Option a.
The atom with the larger first ionization energy is Tin. Option b.
Ionization and ionization energyIonization is the process of removing one or more electrons from an atom or molecule, resulting in the formation of an ion. This can be achieved through a variety of methods, such as exposure to high-energy radiation or contact with other charged particles.
Ionization energy is the amount of energy required to remove an electron from a neutral atom or molecule, resulting in the formation of a positively charged ion. This energy is typically measured in electron volts (eV) or kilojoules per mole (kJ/mol), and varies depending on the identity of the atom or molecule and the electronic configuration of its valence shell. Ionization energy is an important property of atoms and molecules, as it can provide insight into their reactivity and chemical behavior.
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When the hydronium ion concentration of a solution is increased
by a factor of 10, the pH value of the solution
(1) decreases 1 pH unit
(2) decreases 10 pH units
(3) increases 1 pH unit
(4) increases 10 pH units
Answer:
The correct answer is:
(1) decreases 1 pH unit
fill in the blank. every___will have its own unique set of quantum numbers. select the correct answer below: atom shell of electrons proton individual electron
Every atom shell of electrons will have its own unique set of quantum numbers. So the correct option is A.
This is due to the fact that each electron has a unique set of four quantum numbers that define its position and energy in an atom: principal quantum number (n), angular momentum quantum number (l), magnetic quantum number (mℓ), and spin quantum number (ms). These quantum numbers determine the state of the electron and its position within the atom. Each electron has a unique set of quantum numbers, making each atom shell of electrons have its own unique set of quantum numbers.
So the correct option is A.
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Which of the following describes a primary difference between distributive bargaining and interest-based bargaining?(1 point)
1. Interest-based bargaining is a type of negotiation.
2. Distributive bargaining seeks a solution that is beneficial to all parties.
3. Distributive bargaining is a type of negotiation.
4. Interest-based bargaining seeks a solution that is beneficial to all parties.
ECONOMICS! PLEASE HELP!
The primary distinction between these two negotiation strategies is that distributive negotiation does not take into consideration the demands of the other party when negotiating a settlement.
Which of the following statements most accurately describes an instance of distributive bargaining?In a competitive negotiation style known as distributive bargaining, one party only gains when the other party loses.
What sets position-based bargaining apart from interest-based negotiation?Positional negotiating involves both sides criticising one other's proposals in an effort to convince the other that theirs is the best. By engaging in interest-based negotiation, both (or all) sides approach the problem and search for a solution that best advances their individual interests.
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Q10. Hydrocarbon molecules can react with halogens like Cl2 or Br2 (represented generically by X2) where C-H bonds are replaced by C-X bonds, forming HX molecules in the process. Balance the following chemical reaction and compute the estimated heat of reaction using the values above.
C3H8(g) + X2(g) → C3H2X6(g) + HX (g)
You are given the following average bond energies:
H-H 436 kJ/mol
H-X 431 kJ/mol
H-C 414 kJ/mol
C-X 339 kJ/mol
X-X 243 kJ/mol
Answer: To balance the given chemical equation, we can start by counting the number of atoms on both sides of the equation. We have 3 carbon atoms and 8 hydrogen atoms on the left side, and 3 carbon atoms, 6 X atoms, and 1 hydrogen atom on the right side.
C3H8(g) + X2(g) → C3H2X6(g) + HX(g)
To balance the equation, we can add a coefficient of 3 in front of HX on the product side:
C3H8(g) + X2(g) → C3H2X6(g) + 3HX(g)
Now, we have the same number of H atoms on both sides (8 H atoms on each side), and the equation is balanced.
To estimate the heat of reaction, we can use the bond energy values to calculate the energy required to break the bonds in the reactants and the energy released by forming the bonds in the products. We can then subtract the energy required to break the bonds from the energy released by forming the bonds to obtain an estimate of the heat of reaction.
Breaking bonds in the reactants:
3 C-H bonds × 414 kJ/mol = 1242 kJ/mol
1 X-X bond × 243 kJ/mol = 243 kJ/mol
Forming bonds in the products:
6 C-X bonds × 339 kJ/mol = 2034 kJ/mol
1 C-H bond × 414 kJ/mol = 414 kJ/mol
3 H-X bonds × 431 kJ/mol = 1293 kJ/mol
Estimated heat of reaction:
Energy released - energy required
(2034 kJ/mol + 414 kJ/mol + 1293 kJ/mol) - (1242 kJ/mol + 243 kJ/mol) = 2756 kJ/mol
Therefore, the estimated heat of reaction for the given chemical equation is 2756 kJ/mol. Note that this is only an estimate and actual experimental values may differ due to factors such as reaction conditions and the presence of catalysts.
How many silicon atoms are in a piece of glass weighing 6.240
Assuming that the glass is made entirely of silicon dioxide (SiO2), which is a common component of glass, we can calculate the number of silicon atoms based on the molecular weight of SiO2 and the weight of the glass.
How many silicon atoms are in a piece of glass weighing 6.240?The molecular weight of SiO2 is approximately 60 g/mol. Therefore, 6.240 g of SiO2 corresponds to:
6.240 g SiO2 × (1 mol SiO2/60 g SiO2) = 0.104 mol SiO2
Since each molecule of SiO2 contains one silicon atom, the number of silicon atoms in the piece of glass can be calculated by multiplying the number of moles of SiO2 by Avogadro's number (6.022 × 10^23 atoms/mol):
0.104 mol SiO2 × (6.022 × 10^23 atoms/mol) = 6.26 × 10^22 silicon atoms
Therefore, there are approximately 6.26 × 10^22 silicon atoms in a piece of glass weighing 6.240 g, assuming the glass is made entirely of SiO2.
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what is the independent variable and the dependent variable in which cleans teeth better baking soda or toothpaste project.
Answer:
The dependent variable would be the whitening of the teeth of the participants.
Explanation:
value: 4
Which of the following energy types are used in medical imaging process?
Light,heat,chemical, radiation
Answer:
radiation is the answer
What is the molarity of sodium hydroxide if 20.0 mL of the solution is neutralized by each of the following 1.00M solutions?A. 28.0 mL of HClB. 17.4 mL of H3PO4
Molarity of NaOH for 28.0 mL of HCl = 0.560 M and Molarity of NaOH for 17.4 mL of H3PO4 = 0.910 M.
The molarity of sodium hydroxide if 20.0 mL of the solution is neutralized by 28.0 mL of HCl and 17.4 mL of H3PO4 are 0.560 M and 0.910 M, respectively.
A neutralization reaction is a chemical reaction between an acid and a base that results in the formation of salt and water. An acid and a base combine to form a salt and water in a neutralization reaction. Neutralization reactions are essential in life, as they aid in digestion, medical treatments, and other chemical reactions in the body. The balanced chemical equation for the neutralization reaction of sodium hydroxide with hydrochloric acid is:
NaOH + HCl → NaCl + H2O
The balanced chemical equation for the neutralization reaction of sodium hydroxide with phosphoric acid is:
3 NaOH + H3PO4 → Na3PO4 + 3 H2O
Molarity (M) = moles of solute / liters of solution
1. Calculate the number of moles of the acid. Using the given volume of the acid and its molarity, calculate the number of moles of acid.
Moles of acid = Molarity × Volume of acid (in liters)
2. Determine the number of moles of NaOH used in the reaction. Using the balanced equation, determine the number of moles of NaOH that reacted with the number of moles of acid.
Number of moles of NaOH = Number of moles of acid (from step 1)
3. Calculate the molarity of the NaOH solution.
Molarity of NaOH = Number of moles of NaOH / Volume of NaOH (in liters)Molarity of NaOH for 28.0 mL of HCl
= 0.560 M
Molarity of NaOH for 17.4 mL of H3PO4 = 0.910 M
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which of the following elements is the most difficult to ionize? select the correct answer below: fr h he xe
The He element is the one that is hardest to ionize.
The correct answer is He.
Why is it called elements?An object is categorised as an element if it cannot be reduced to a simpler form. It is possible to recognise them by their particular atomic number. The elements are organised into groups in the periodic table based on their atomic numbers, and those having related characteristics are underlined.
What components comprise the elements?An element is any substance made entirely of a certain type of atom, which are the building blocks of all matter. We know that each element is composed of protons, neutrons, and electrons. Some of the tiniest components in all of nature are these.
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based on the information in the table, which of the following arranges the bonds in order of decreasing polarity
The bonds would be arranged in order of decreasing polarity as follows: H-F Bond (most polar) > O-H Bond and C-H Bond (tied) > C-C Bond (least polar).
In order to arrange the bonds in order of decreasing polarity, we can look at the electronegativity difference between the two atoms of each bond. Electronegativity differences will determine whether the bond is polar, nonpolar, or ionic.
In general, the polarity of a bond is determined by the electronegativity difference between the atoms in the bond. The greater the difference in electronegativity, the more polar the bond is likely to be.
The following is a list of the bonds in order of decreasing polarity, based on the information provided in the table:
The table shows the following:
H-F Bond: Electronegativity difference = 1.9
C-H Bond: Electronegativity difference = 0.4
C-C Bond: Electronegativity difference = 0
HF is the least polar bond since the difference in electronegativity between hydrogen and fluorine is smaller than the differences between the other atoms in the list.
Therefore, the bonds would be arranged in order of decreasing polarity as follows: H-F Bond (most polar) > and C-H Bond (tied) > C-C Bond (least polar).
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The complete questions is:
Based on the information in the table, which of the following arranges the bonds in order of decreasing polarity
The table shows the following:
H-F Bond: Electronegativity difference = 1.9
C-H Bond: Electronegativity difference = 0.4
C-C Bond: Electronegativity difference = 0
