When dissolved in water to make a 0.10 M solution, the potassium salt of a strong acid would produce the highest pH of the available alternatives.
A potassium base and an acid react to generate the chemical known as the potassium salt. It is a form of salt, an ionic compound made up of negatively and positively charged ions known as anions and cations, respectively. Potassium salts are useful in a variety of industries, such as fertilisers, pharmaceuticals, and food processing. They are frequently utilised as sources of alkali metal in different chemical reactions or as supplements to give plants and animals more potassium. Depending on the exact acid and base that were used to create the salt, the properties of potassium salts can change, and the resulting salt can have distinct physical and chemical properties.
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use the trendline equation in fig6.2 to determine the kelvin temperature at which the pressure equals .72 atm
When the pressure is 0.72 atm, the temperature in Kelvin is 156 K.
To determine the Kelvin temperature when the pressure is 0.72 atm, you will need to use the trendline equation given in Fig 6.2. First, find the equation of the trendline by using the graph's two points, (300 K, 1 atm) and (500 K, 2 atm).
The equation for the trendline is:
y = mx + b
Where y is pressure, x is the temperature in Kelvin, m is the slope, and b is the y-intercept. We can find the slope of the trendline by using the two points provided in the graph:
Slope (m) = (y2 - y1) / (x2 - x1)
Slope = (2 atm - 1 atm) / (500 K - 300 K)
Slope = 0.005 atm/K
The equation for the trendline can now be written: y = 0.005x + b. To find the y-intercept, b, we can use one of the two points: Solving for b:
1 atm = 0.005(300 K) + bb = 1.5 atm
Now we can use the equation for the trendline to find the temperature (x) at which the pressure (y) equals 0.72 atm:
0.72 atm = 0.005x + 1.5 atm
0.72 atm - 1.5 atm = 0.005x
-0.78 atm = 0.005xx
= -0.78 atm / 0.005x
= 156K
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please answer the question for BRAINLIEST asap
Using the formula M1V1 = M2V2 , if I add water to 100.0 mL of a 0.15 M NaOH solution until the final volume is 150 mL, what will the molarity of the diluted solution be?
Question 3 options:
0.23M
1.0M
0.10M
1.0E5M
Answer:
M2= 0,1 M
Explanation:
M1=0,15 M
V1= 100 mL =0,1 L
M2= ?
V2= 150 mL = 0,15 L
M1V1= M2V2
(0,15 mol/L) (0,1 L) = M2 (0,15 L)
0,015 mol / 0,15 L = M2
M2= 0,1 M
Seventy five percent of a compound is carbon. If you have 250 grams of this particular compound, how much carbon is contained?
Answer:
The compound has 187.5 g. of Carbon
Explanation:
If the 100% of the compound is 250 gr, then you can calculate the 75% of it by multiplying:
Amount of Carbon = (75%) 250 g.
75%= 0.75
250 (0.75)
= 187.5 g.
Which of the following molecules is drawn in a conformation that has a proton and a leaving group anti-periplanar? H₂C, Br Ph. H CH3 Br H H₂C Br H₂C Ph H₂C CH3 H Ph H₂C, Br H Ph Save for Later CH3 CH3 CH3 CH3 CH3 Sul
The molecule that is drawn in a conformation that has a proton and a leaving group anti-periplanar is H₂C, Br.
The A, B, C, and D bond angles of a molecule are referred to as anti-periplanar, or antiperiplanar, in organic chemistry. The dihedral angles of the A–B and C–D bonds in this conformer are larger than +150° or less than 150°. In textbooks, the term "anti-periplanar" is frequently used to refer to a strictly anti-coplanar structure with a 180° AB CD dihedral angle. The anti-periplanar functional groups will be 180° apart from one another and in a staggered configuration in a Newman projection of the molecule.
Conformation is an essential factor in predicting reactivity in organic molecules. The anti-periplanar conformation of a molecule is one that occurs when two atoms in a molecule are in the same plane and are separated by 180 degrees. In this case, the proton and leaving group are placed in a perpendicular plane to the atoms directly in between them. This is the most stable conformer of the molecule. A significant factor in predicting reactivity in organic molecules is conformation. In this case, the molecule H₂C, Br is drawn in a conformation that has a proton and a leaving group anti-periplanar.
Therefore, the correct option is H₂C, Br.
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Please help me Look at the picture below
The first two statements are false, whereas the last statement, which says that pressure and volume of a gas are inversely related, is true.
How are pressure and volume related to one another?Statement 1: This claim was incorrect because, according to the ideal gas law, PV=nRT, pressure (P) and volume (V) are inversely proportional to each other at a constant temperature (T) and amount of gas (n). This means that as pressure increases, volume decreases. This relationship is known as Boyle's law. Therefore, the statement that pressure has no effect on volume of a gas is false.
Statement 2: This claim was incorrect because, pressure and volume of a gas are inversely related according to Boyle's law, which states that at a constant temperature, the pressure of a gas is inversely proportional to its volume. This means that if the pressure of a gas increases, its volume will decrease, and if the pressure decreases, the volume will increase, as long as the temperature remains constant.
Statement 3: This claim was correct because, According to Boyle's law, the pressure and volume of a gas are inversely proportional to each other, which means that when the pressure of a gas increases, its volume will decrease and vice versa, as long as the temperature and the number of particles in the gas are kept constant. This relationship is expressed mathematically as P₁V₁ = P₂V₂, where P₁ and V₁ are the initial pressure and volume, and P₂ and V₂ are the final pressure and volume.
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In the valence shell electron pair repulsion (VSEPR) theory, a group is defined as A an atom. B a lone pair of electrons. C a valence electron. D either an atom or a valence electron. E either an atom or a lone pair of electrons.
In the valence shell electron pair repulsion (VSEPR) theory, a group is defined as either an atom or a lone pair of electrons. The correct option is (E).
In the valence shell electron pair repulsion (VSEPR) theory, a group is defined as a combination of atoms and/or lone pairs of electrons. An atom is a single atom, and a lone pair of electrons is two electrons that form a pair. A valence electron is a single electron in an atom's outermost shell, and therefore it cannot form a group on its own.
In the valence shell electron pair repulsion (VSEPR) theory, a group is defined as either an atom or a lone pair of electrons.
The valence shell electron pair repulsion (VSEPR) theory is a model in chemistry that is used to forecast the geometry of different molecules. It is based on the idea that the atoms and lone pairs in the outer shell of a molecule are repelled by one another, and so move as far away from each other as possible. This rule is used to determine the 3D geometry of a molecule.
In the valence shell electron pair repulsion (VSEPR) theory, a group is defined as either an atom or a lone pair of electrons. The VSEPR theory considers that the most stable molecular structure is one that has the least amount of electron pair repulsion among its valence electrons. VSEPR theory gives us a clue about the geometry of the molecule. The molecular geometry of the molecule is determined by the electron groups, whether they are bonding electrons or lone pair electrons.
For instance, if there are three electron groups on a central atom, it would adopt a trigonal planar geometry. So, The correct option is (E).
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FILL IN THE BLANK. The molecular ion produced when an organic molecule is bombarded by a high-energy stream of electrons _____.
The molecular ion produced when an organic molecule is bombarded by a high-energy stream of electrons is known as a radical cation.
Radical cations are highly reactive and can react quickly with other compounds in their environment. The number of electrons removed to form the radical cation is determined by the type of organic molecule that is bombarded. If an alkene is bombarded, two electrons are typically removed, forming an allyl radical cation, while the addition of three electrons is necessary to form a benzyl radical cation. Radical cations are stabilized by the formation of new bonds with other molecules, thereby forming an adduct. The adduct can then be separated and characterized using chromatographic techniques. Additionally, radical cations can also react with nucleophiles, resulting in a variety of other reaction products. Thus, the molecular ion produced when an organic molecule is bombarded by a high-energy stream of electrons is a radical cation.
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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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When a solution of CaCl
2
is dissolved in water, the temperature rises. Which of these statements can definitely be inferred from this observation? How to analyze this problem?
I. The entropy change of the system for this process is negative.
II. The entropy change of the system for this process is positive.
III. The interactions between the species in solution are stronger compared to those in the separate solute and solvent.
IV. The interactions in the separate solute and solvent are stronger compared to those between the species in solution.
The statement that can definitely be inferred from the observation that the temperature rises when a solution of CaCl2 is dissolved in water is Option III is correct.
The interactions between the species in solution are stronger compared to those in the separate solute and solvent. To analyze this problem, we need to consider the entropy of the system, which is related to the disorder or randomness of a system. The entropy of a system can be calculated by measuring the energy that must be supplied to the system to return it to its original state.
When the CaCl2 is dissolved in water, the entropy of the system increases because of the increase in the randomness of the system. This increase in entropy leads to a rise in temperature. Because the interactions between the species in solution are stronger than those in the separate solute and solvent, this suggests that the entropy of the system for this process is positive. The interactions in the separate solute and solvent are weaker than those between the species in solution.
Therefore, the statement that can definitely be inferred from the observation that the temperature rises when a solution of CaCl2 is dissolved in water is Option III.
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The air trapped inside a 240 mL glass bottle has a pressure of 1.0 atm and a temperature of 25.0 °C. You put the glass bottle into a freezer. After several hours, the air trapped inside the bottle has a temperature of -35.0 °C and a pressure of 0.80 atm. Determine the value of k for the air trapped inside the glass bottle before and after cooling to show that P equals kT.
The value of k for the air trapped inside the glass bottle before and after cooling is 0.2021, thus proving that P equals kT.
The air trapped inside a 240 mL glass bottle has a pressure of 1.0 atm and a temperature of 25.0 °C. To determine the value of k for the air trapped inside the glass bottle before and after cooling to show that P equals kT, we need to use the ideal gas law equation, which states that PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the ideal gas constant, and T is temperature. When the bottle is put into the freezer, the temperature decreases from 25.0 °C to -35.0 °C and the pressure decreases from 1.0 atm to 0.80 atm. Therefore, we can calculate the value of k by plugging in the values of pressure and temperature into the equation: PV = nRT. By rearranging the equation and solving for k, we find that k = PV/nRT. Plugging in the values, we get k = (1.0 atm x 240 mL) / (n x 0.0821 atm•L/mol•K x (25.0°C - (-35.0°C)) = 0.2021. This means that the value of k for the air trapped inside the glass bottle before and after cooling is 0.2021, thus proving that P equals kT.
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Using C2H4 + 3 O2 -> 2 CO2 + 2 H2O. If 20 moles of fuel are combusted in the above equation, how many moles of O2 are consumed?
Answer:
Using C2H4 + 3 O2 -> 2 CO2 + 2 H2O. If 20 moles of fuel are combusted in the above equation, how many moles of O2 are consumed?
Explanation:
According to the balanced chemical equation:
1 mole of C2H4 reacts with 3 moles of O2
Therefore, for 20 moles of C2H4 combusted, we would need:
20 moles C2H4 × (3 moles O2 / 1 mole C2H4) = 60 moles O2
So, 60 moles of O2 are consumed in the combustion of 20 moles of C2H4.
Determine the pressure (in atm) of a 7.16-g sample of He gas at 692 K in a container with a volume of 55.9 L.
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
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
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.
What kind of scientist would study the effects of acid rain on marble statues? A. A physicist B. A biologist C. A chemist D. An economist
Scientists would research the impacts of marble monuments and acid rain. A chemist. Hoping this is useful.
The correct answer is :C.
What are the substances that change the earth's surface?Surface sediments are transported and large stones are broken up through wind, water, and ice. Years are often needed for weathering, erosion, and deposition to cause noticeable changes. Nonetheless, certain things change the Planet's surface far more quickly than others. Extreme events, earthquakes, and volcanic eruptions are a few of them.
What adjustments to the Planet's surface may rain makes?Weathering and erosion caused by water movement change the properties of the terrain. Regional wind patterns and climate are defined by several interactions, including the role of the ocean. The unique physical and chemical properties of water have a profound effect on the planet's dynamics.
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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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Which of the following are volume ratios from this equation? Select all that apply.
2H2 + O2 --> 2H2O
The volume ratios from the equation 2H2 + O2 → 2H2O are:
2 L H2 : 1 L O2 (or 2 mol H2 : 1 mol O2)1 L O2 : 2 L H2O (or 1 mol O2 : 2 mol H2O)The coefficients in a balanced chemical equation give the ratio of moles of reactants and products. From the equation 2H2 + O2 → 2H2O, we can see that:
2 moles of H2 react with 1 mole of O2 to produce 2 moles of H2O.Therefore, the following volume ratios are valid:
2 L H2 : 1 L O21 L O2 : 2 L H2OWhat are the reactants?
The reactants are the substances that participate in a chemical reaction and are consumed to form new products. In the equation 2H2 + O2 → 2H2O, the reactants are hydrogen gas (H2) and oxygen gas (O2). These reactants undergo a chemical reaction to form water (H2O) as the product.
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Straw like organ used to intake for and water or dispose of waste
A tube is the term used to describe the straw-like organ utilized by both plants and animals to consume food and water or to eliminate waste.
What is tube?A hollow, cylindrical structure that is often present in living things is referred to as a tube. Many biological structures, such as blood veins, intestines, respiratory tracts, and the reproductive system, contain tubes. Many biological functions, including the passage of nutrients, the exchange of gases, and the removal of waste materials, depend on tubes.
These tubes are referred to as xylem and phloem in plants. While the phloem moves sugars and other nutrients from the leaves to other parts of the plant, the xylem is in charge of moving water and minerals from the roots to the rest of the plant.
Animals have many species-specific tube-like organs in charge of intake and waste elimination. Mammals, for instance, have a sophisticated digestive system that consists of the anus, esophagus, stomach, and intestines. Together, these organs help the body digest food, extract nutrients, and get rid of waste.
Generally, tubes or channels are essential for both plant and animal life because they let them take in the substances they need and let waste out.
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Cryolite, Na3AlF6(s),
an ore used in the production of aluminum, can be synthesized using aluminum oxide.
equation:
Al2O3(s)+6NaOH(l)+12HF(g)⟶2Na3AlF6+9H2O(g)
If 10.3 kg of Al2O3(s),
55.4 kg of NaOH(l),
and 55.4 kg of HF(g)
react completely, how many kilograms of cryolite will be produced?
mass of cryolite produced:
The mass (in kilograms) of Cryolite, Na₃AlF₆ produced, given that 10.3 Kg of Al₂O₃, 55.4 Kg of NaOH, and 55.4 Kg of HF react completely is 42.4 Kg
How do i determine the mass of Na₃AlF₆ produced?The mass of Na₃AlF₆ produced from the reaction can be obtained as follow:
Al₂O₃(s) + 6NaOH(l) + 12HF(g) ⟶ 2Na₃AlF₆ + 9H₂O(g
Molar mass of Al₂O₃ = 102 g/molMass of Al₂O₃ from the balanced equation = 1 × 102 = 102 g = 102 / 1000 = 0.102 KgMolar mass of Na₃AlF₆ = 210 g/molMass of Fe from the balanced equation = 2 × 210 = 420 g = 420 / 1000 = 0.420 KgFrom the balanced equation above,
0.102 Kg of Al₂O₃ reacted to produce 0.420 Kg of Na₃AlF₆
Therefore,
10.3 Kg of Al₂O₃ will react to produce = (10.3 × 0.420) / 0.102 = 42.4 Kg of Na₃AlF₆
Thus, from the above calculation, it is evident that the mass of Na₃AlF₆ produced is 42.4 Kg
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Consider a 0.238 M aqueous solution of sodium hydroxide, NaOH.
How many grams of NaOH are dissolved in 23.46 mL?
Answer:
0.2237 grams of NaOH
Explanation:
To calculate the grams of NaOH dissolved in 23.46 mL of a 0.238 M solution of NaOH, we can use the formula:
mass = molarity x volume x molar mass
where mass is the mass of NaOH dissolved in grams, molarity is the concentration of NaOH in moles per liter, volume is the volume of the solution in liters, and molar mass is the molar mass of NaOH in grams per mole.
First, we need to convert the volume of the solution from milliliters to liters:
volume = 23.46 mL / 1000 mL/L
volume = 0.02346 L
The molar mass of NaOH is 40.00 g/mol.
Now we can plug in the values and solve for mass:
mass = 0.238 M x 0.02346 L x 40.00 g/mol
mass = 0.2237 g
Therefore, there are 0.2237 grams of NaOH dissolved in 23.46 mL of a 0.238 M solution of NaOH.
2ca + o2 - 2cao identify the oxidizing and reducing agents
Answer:
Ca is a reducing agent and O is the oxidizing agent.
Explanation:
calcium is the reducing agent as it reduces oxygen while it oxidize itself and oxygen is an oxidising agent because it oxidized others and reduces itself. in this equation oxygen is reducing and Calcium is oxidising. and as it is stated in the definition that oxidizing agent is the agent which oxidises others and reduces itself and it is also stated that reducing agent reduces others and oxidize itself. so based on this statement calcium is reducing agent and O is a oxidizing agent.
For the partially completed Lewis structures, pick the correct Lewis structure.
How many Valence Electrons total overall?
The correct Lewis structures of the compounds that we have in the question have been shown in the images attached.
What is the Lewis structure?A Lewis structure is a diagram that shows the bonding between atoms in a molecule and the arrangement of electrons around the atoms. It is also known as a Lewis dot structure, Lewis dot diagram, or electron dot structure.
Lewis structures are useful in predicting the geometry of molecules and determining the polarity of molecules. They are also helpful in understanding the reactivity of molecules and how they interact with other molecules.
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Do electron pair geometry of Carbonothioyl dibromide please
Answer:
See below.
Explanation:
To determine the electron pair geometry of Carbonothioyl dibromide, we need to first draw its Lewis structure:
Br Br
\ /
C=S
/
Br Br
Carbonothioyl dibromide has four electron groups around the central sulfur atom: two single bonds with the two bromine atoms, one double bond with the carbon atom, and one lone pair of electrons on the sulfur atom.
Using VSEPR theory, we can predict the electron pair geometry by considering both the bonding and the lone pairs of electrons. In this case, the electron pair geometry of Carbonothioyl dibromide is tetrahedral because it has four electron groups around the central sulfur atom.
However, the molecular geometry of Carbonothioyl dibromide is trigonal pyramidal due to the presence of one lone pair of electrons on the sulfur atom.
Calculate the pH of a 0.40 M solution of sodium acetate (NaCH3COO) given that the Ka of acetic acid (CH3COOH) is 1.8 x 10-5 a. 9.26 c. 2.57 O d. 4.83 e. 11.43
Option (C) is correct. The pH of the solution of sodium acetate (NaCH3COO) given that the Ka of acetic acid (CH3COOH) is 2.57.
Sodium acetate is defined as the salt of a weak acid and strong base from the equation:
C2H3NaO2 ---> CH3COO−+Na+
CH3COO− + H2O ⇌ CH3COOH + OH−
As it is a weak acid and strong base, this is a good indicator of a fairly high pH value.
Kb = [HB+] + [OH−] / [B]
where, [B] is the concentration of the base[HB+] is the concentration of base ions.[OH−] is the concentration of the hydroxide ions.
Ka Kb=1⋅10−14
So, Kb=1⋅10−14 / 1.8⋅10−5
=5.555...⋅10−10
Putting the value of this in the expression of pH we get the value of pH .
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how many different alkenes result when 2-bromooctane is treated with a strong base? select answer from the options below
Strong bases like sodium ethoxide (NaOEt) or sodium hydroxide (NaOH) are used to treat 2-bromooctane, which then goes through an elimination process (also known as dehydrohalogenation) to produce various alkenes.
Which 4 alkenes are there?Ethene, propene, butene, and pentene are the first four alkenes.
Alkenes are a group of unsaturated hydrocarbons (i.e., molecules with solely carbon and hydrogen) that include at least one double bond from carbon to carbon. Olefins is a different name for alkenes. Due to the double bond, alkenes are more reactive than alkanes.
Both the hydrocarbons alkene and alkyne are unsaturated.
Whereas two Carbon atoms in Alkyne are joined by a triple bond, two Carbon atoms in Alkene only have a double bond.
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Vinegar's pH is about 2-3. Which statement is TRUE?
Vinegar is moderate to highly acidic.
Vinegar is very slightly acidic.
Vinegar is very slightly basic.
Vinegar is moderate to highly basic.
The statement that is TRUE is: "Vinegar is moderate to highly acidic."
Vinegar has a pH of about 2-3, which indicates that it is an acidic substance. pH scale ranges from 0 to 14, where pH 0 is the most acidic.
What is a Vinegar ?Vinegar is a liquid consisting mainly of acetic acid and water. It is typically made through a fermentation process where sugar is first converted to alcohol by yeast and then further oxidized to acetic acid by bacteria.
Vinegar has been used for thousands of years as a condiment, preservative, and for medicinal purposes. It is commonly used in cooking, food preservation, and as a cleaning agent. Different types of vinegar can be made from various sources such as grapes, apples, rice, malted barley, and many others, and each type has a unique flavor and acidity level. Some popular types of vinegar include white vinegar, red wine vinegar, apple cider vinegar, and balsamic vinegar.
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If a vinegar solution contains 0.26 mole of acetic acid (HC₂H₃O₂) in 30 mL of solution, what is the concentration (molarity) of the solution?
Answer:
First, we need to convert the volume of the solution from milliliters (mL) to liters (L) since molarity is expressed in moles of solute per liter of solution.
30 mL = 0.03 L
Next, we can use the formula for molarity:
Molarity = moles of solute / liters of solution
Plugging in the given values:
Molarity = 0.26 moles / 0.03 L = 8.67 M
Therefore, the concentration of the vinegar solution is 8.67 M.
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
Enter your answer in the provided box.
Answer the following questions about the fermentation of glucose (C6H12O6, molar mass 180.2 g/mol) to ethanol (C2H6O) and CO2.
C6H12O6(s) → 2 C2H6O(l) + 2 CO2(g) ΔH = −16 kcal/mol
glucose ethanol
How many kilocalories of energy are released from 40.0 g of glucose?
kcal of energy released
Report answer to TWO significant figures.
Answer:
Explanation:
40/ 180.2 x (-16 / 1 mole glucose)=-3.6 KJ
3. Draw a Lewis dot structure for the fictitious molecular ion [ZO2]-1. Assume that the central Z atom is bonded to each of the outer O atoms by a single bond. What is the formal charge on the Z atom?
The formal charge on the Z atom in the [ZO2]-1 ion is +1.
The Lewis dot structure for the [ZO2]-1 molecular ion is:
O
|
Z === O
|
O-
1. Determine the total number of valence electrons in the ion by adding the valence electrons of each atom and the charge of the ion.
Z has 4 valence electrons, while each O atom has 6 valence electrons.The ion has an overall negative charge of 1, so there is one extra electron.Total number of valence electrons = 4 + 6 + 6 + 1 = 172. Connect the Z atom to each O atom with a single bond, which uses up 2 electrons.
We now have 15 electrons left to distribute.3. Add the remaining electrons in pairs as lone pairs to each atom until all valence electrons are used up.
Each O atom needs 2 lone pairs (4 electrons).Z needs 2 lone pairs (4 electrons).4. Draw the Lewis dot structure.
The Lewis dot structure for [ZO2]-1 is:O
|
Z === O
|
O-
5. Calculate the formal charge on the Z atom using the formula:
Z has 4 valence electrons.Z has 2 lone pairs (4 electrons) and 2 bonding electrons (1 bond to each O).Formal charge = valence electrons - (number of lone pair electrons + 1/2 x number of bonding electrons)
Formal charge = 4 - (2 + 1/2 x 2) = 4 - 3 = +1
Therefore, the formal charge on the Z atom in the [ZO2]-1 ion is +1.
What is valence electron?
A valence electron is an electron in the outer shell associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed.
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