Answer:
An electron is a negative quirk that follows an axis on the outside of an atom
Which Reference Tables must be used to determine the number of carbon atoms in a parent chain and the type of bonding between the atoms in the parent chain?
O Table P, only
O Table P and Table O, only
O Table N and Table O, only
O Table P and Table Q, only
Answer:
Explanation:
Did you get the answer to the test, I have the same one but don’t understand the questions that well
What is the molarity of a 750 milliliters solution containing 54.0 grams of KBr (help me please)
Answer: The molarity of KBr solution is 0.605 M
Explanation:
Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L.
The formula used to calculate molarity:
[tex]\text{Molarity of solution}=\frac{\text{Given mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (mL)}}[/tex] .....(1)
Given values:
Given mass of KBr = 54.0 g
Molar mass of KBr = 119 g/mol
Volume of the solution = 750 mL
Putting values in equation 1, we get:
[tex]\text{Molarity of solution}=\frac{54.0\times 1000}{119\times 750}\\\\\text{Molarity of solution}=0.605M[/tex]
Hence, the molarity of KBr solution is 0.605 M
Question 8 of 10
Which functional group is within the compound shown below?
R-OH
A. Carbonyl
B. Amino
C. Ester
D. Hydroxy
Answer:
Hydroxyl (alcohol compound)
Explanation:
*view photo*
D. Hydroxy
A hydroxy or hydroxyl group is a functional group with the chemical formula -OH and composed of one oxygen atom covalently bonded to one hydrogen atom.Hydroxyl groups are polar, and the oxygen side is always negative, while the hydrogen side is always positive.The functional group of the alcohols is the hydroxyl group, –OH.For example: Methanol is an alcohol containing hydroxyl functional group.Therefore, the correct option is option D.
Learn more:
brainly.com/question/696051
What happens when water dissolves in Ammonia?
A) Water acts as a proton acceptor
B) Water acts as a proton donor
C) Water acts as a strong base
D) Water acts as a strong acid
Answer:
C) Water acts as a strong base
Explanation:
The water acts as a strong base, when water dissolves in Ammonia.
Ammonia reacts with water to make a clear solution of ammonium hydroxide, or household ammonia.
what type of volcanic eruption produce ash fall?
Explanation:
I would say explosive eruptions caused by decompression of the dissolved gases in the magma. The Mt Pinatubo eruption is an example of a massive ash fall that eventually closed down an American base in the Philippines. And just recently the island of St. Vincent suffered major damage from ash fall due to a volcanic eruption.
Which is the graph of y = 5x + 5?
Answer:
I'm pretty sure it's The second one
Explanation:
That one is the only one that looks like it started on a positive 5
Answer:
B
Explanation:
What is the chemical formula of calcium chloride?
A.
CaCl
B.
Ca2Cl2
C.
Ca2Cl
D.
CaCl2
Answer:
D
Explanation:
calicium exchange valency of 2 with 1 valency of chlorine
Based upon the following diagram, propose a possible identity for atoms X and Y. Explain your answer in terms of the periodic table and ionic bonding. Lastly, explain why the atoms bond in this ratio.
Answer:
Up until now we have been discussing only the elemental forms of atoms which are neutrally charged. This is because the number of electrons (negative in charge) is equal to the number of protons (positive in charge). The overall charge on the atom is zero, because the magnitude of the negative charge is the same as the magnitude of the positive charge. This one-to-one ratio of charges is not, however, the most common state for many elements. Deviations from this ratio result in charged particles called ions.
Throughout nature, things that are high in energy tend to move toward lower energy states. Lower energy configurations are more stable, so things are naturally drawn toward them. For atoms, these lower energy states are represented by the noble gas elements. These elements have electron configurations characterized by full s and p subshells. This makes them stable and unreactive. They are already at a low energy state, so they tend to stay as they are.
The elements in the other groups have subshells that are not full, so they are unstable when compared to the noble gases. This instability drives them toward the lower energy states represented by the noble gases that are nearby in the periodic table. In these lower energy states, the outermost energy level has eight electrons (an “octet”). The tendency of an atom toward a configuration in which it possesses eight valence electrons is referred to as the “Octet Rule.”
There are two ways for an atom that does not have an octet of valence electrons to obtain an octet in its outer shell. One way is the transfer of electrons between two atoms until both atoms have octets. Because some atoms will lose electrons and some atoms will gain electrons, there is no overall change in the number of electrons, but with the transfer of electrons the individual atoms acquire a nonzero electric charge. Those that lose electrons become positively charged, and those that gain electrons become negatively charged. Recall that atoms carrying positive or negative charges are called ions. If an atom has gained one or more electrons, it is negatively charged and is called an anion. If an atom has lost one or more electrons, it is positively charged and is called a cation. Because opposite charges attract (while like charges repel), these oppositely charged ions attract each other, forming ionic bonds. The resulting compounds are called ionic compounds.
The second way for an atom to obtain an octet of electrons is by sharing electrons with another atom. These shared electrons simultaneously occupy the outermost shell of both atoms. The bond made by electron sharing is called a covalent bond. Covalent bonding and covalent compounds will be discussed in Chapter 4 “Covalent Bonding and Simple Molecular Compounds”.
At the end of chapter 2, we learned how to draw the electron dot symbols to represent the valence electrons for each of the elemental families. This skill will be instrumental in learning about ions and ionic bonding. Looking at Figure 3.1, observe the Noble Gas family of elements. The electron dot symbol for the Nobel Gas family clearly indicates that the valence electron shell is completely full with an octet of electrons. If you look at the other families, you can see how many electrons they will need to gain or lose to reach the octet state. Above, we noted that elements are the most stable when they can reach the octet state. However, it should also be noted that housing excessively high negative or positive charge is unfavorable. Thus, elements will reach the octet state and also maintain the lowest charge possible. You will note that for the IA, IIA, IIIA and transition metals groups, it is more economical to lose electrons (1-3 electrons) from their valence shells to reach the octet state, rather than to gain 5-7 electrons. Similarly main group columns VA, VIA, and VIIA tend to gain electrons (1-3) to complete their octet, rather than losing 5-7 electrons. Some atoms, like carbon, are directly in the middle. These atoms don’t like to gain or lose electrons, but tend to favor the sharing model of chemical bonding. The remaining sections of this chapter will focus on the formation of ions and the resulting ionic compounds.
Explanation:
Por qué razón se fomentó la inmigración Europea?
Hola aquí va la respuesta!
Se fomentó la inmigración europea porque la economía no era buena y vinieron a Paraguay para mejorar su situación.
Hola aquí va la respuesta!
Se fomentó la inmigración europea porque la economía no era buena y vinieron a Paraguay para mejorar su situación.
Please let me know whether did I chose the correct answer for the following pictures. Please answer it with your knowledge not for the points, I really need this, thanks!!
Answer:
With my knowledge you got 2. correct, but that's all I could say.
PLEASE ANSWER QUICKLY!! 25. Which gas sample contains a total of 3.0 x 1023 molecules?
A) 71 g of Cl2
B) 2.0 g of H2
C) 14 g of N2
D) 38 g of F2
Answer:
14 g of N2
Explanation:
If we look at the options, we will notice that the correct answer needs to be a gas that has about half of the molecular mass of the gas.
If we consider nitrogen gas whose molecular mass is 28g/mol, half of the molecular mass is 14 g.
So;
28g of N2 contains 6.02 × 10^23 molecules of N2
14g of N2 contains 14 × 6.02 × 10^23 /28
= 3.0 x 10^23
helppppp meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Answer:
The industry represented in the photo is most likely fishing. Other industries that rely on accurate weather forecasts are shrimping, fishery, and aquaculture
Explanation:
por que el petroleo es un no recurso renovable
Answer:
Por ejemplo, el petróleo o el carbón son ejemplos de recursos no renovables porque, aunque se forman mediante un proceso natural, este necesita demasiado tiempo. ... Esos combustibles fósiles provienen de materia orgánica, pero tardan cientos de miles de años en producirse.
what is large intestine
Explanation:
The large intestine (colon or large bowel) is about 5 feet long and about 3 inches in diameter. The colon absorbs water from wastes, creating stool. As stool enters the rectum, nerves there create the urge to defecate.hope it helps.stay safe healthy and happy!!!Please help it’s due today
Estimate the heat evolved when 74.6 g of sulfur dioxide (molar mass = 64.07 g/mol) is
converted to sulfur dioxide for the given thermochemical equation.
SO2(g) + 12 O2(g)
SO3(g)
AH = -99.1 kJ/mol
The heat evolved when 74.6 g of sulfur dioxide (molar mass = 64.07 g/mol) is 2838kJ/mol. For the given thermochemical equation.
SO2(g) + 12 O2(g)
SO3(g)
AH = -99.1 kJ/mol
What is thermochemical equation ?A balanced stoichiometric chemical equation known as a thermochemical equation contains the enthalpy change, ΔH.
There are two types of thermochemical reaction:
Thermogenic Reaction. certain thermochemical processes that absorb heat. Enthalpy change for this reaction is favorable.
Heat-producing Reaction. Exothermic reactions are those in which energy or heat are released during the reaction.
A chemical equation shows the initial molecule, reactants, and final products separated by an arrow, but a thermochemical equation is a balanced stoichiometric chemical reaction that also includes the enthalpy change.
Thus, 2838 kJ/mol heat evolved in given equation.
To learn more about thermochemical equation refer the link below;
https://brainly.com/question/10023358
#SPJ2
If a sample of oxygen has a volume of 160 L at 91 degrees celsius what will the oxygen be when the temperature drops to 0.00 degrees celsius.
Answer:
120 L
Explanation:
Step 1: Given data
Initial volume (V₁): 160 LInitial temperature (T₁): 91 °CFinal volume (V₂): ?Final temperature (T₂): 0.00 °CStep 2: Convert the temperatures to the Kelvin scale
We will use the following expression.
K = °C + 273.15
K = 91°C + 273.15 = 364 K
K = 0.00°C + 273.15 = 273.15 K
Step 3: Calculate the final volume occupied by the oxygen
Assuming ideal behavior and constant pressure, we can calculate the final volume occupied by the oxygen using Charles' law.
V₁/T₁ = V₂/T₂
V₂ = V₁ × T₂/T₁
V₂ = 160 L × 273.15 K/364 K = 120 L
Write the formula for Magnesium sulphate
MgSO4 is the formula for magnesium
Bacterial pathogens are grown in devices using a __________ developed to optimize the yield of the antigen while maintaining it's integrity.
Answer:
growth medium
Explanation:
The pathogenic bacteria are the bacteria which causes diseases. They may include fungi, worms, protozoa, viruses, bacteria, etc.
The bacterial pathogens are made to grow with the help of a growth medium which is developed to optimize the antigen's yield and also it maintains the integrity of the pathogenic bacteria.
The value for the equilibrium constant for the reaction 2SO2(g)+O2(g) rightleftharpoons 2SO3(g) is 4.0*10^ 1 24 at 298K What would be the value for the equilibrium constant for the following reaction at the same temperature? 2SO3(g) rightleftharpoons2502(g)+O2(g)
Answer:
The value for the equilibrium constant for the reaction [tex]2SO2(g)+O2(g) <=> 2SO3(g) Kc=4.0*10^24\\[/tex] at 298K .
What would be the value for the equilibrium constant for the following reaction at the same temperature?
[tex]2SO3(g) <=> 2SO2(g)+O2(g)[/tex]
Explanation:
The Kc value for the reverse reaction of the first reaction that is:
[tex]2SO2(g)+O2(g) <=> 2SO3(g) Kc=4.0*10^{24}\\[/tex]
[tex]Kc=\frac{SO3^{2} }{SO2^{2}.O2 }[/tex]
For the reverse reaction,
[tex]2SO3(g) <=> 2SO2(g)+O2(g)[/tex]
[tex]Kc=\frac{SO2^{2}O2 }{SO3^{2}. }[/tex]
So, it is the inverse of the first Kc value.
Hence, the new Kc value is:
[tex]Kc=\frac{1}{4.0*10^{24} } \\ =2.5*10^{-25}[/tex]
Answer is :
Kc=2.5*10^-25.
2 NABr + Ca(OH)2 = CaBr2 + 2 NaOH How many moles of CaB 2 are produced, if 14.72 moles of NaBr and excess Ca(OH) 2 react?
Answer: 7.36 moles of [tex]CaBr_2[/tex] will be produced.
Explanation:
We are given:
Moles of NaBr = 14.72 moles
The given chemical equation follows:
[tex]2NaBr+Ca(OH)_2\rightarrow CaBr_2+2NaOH[/tex]
By the stoichiometry of the reaction:
2 moles of NaBr produces 1 mole of calcium bromide
So, 14.72 moles of NaBr will produce = [tex]\frac{1}{2}\times 14.72=7.36mol[/tex] of calcium bromide
Hence, 7.36 moles of [tex]CaBr_2[/tex] will be produced.
1) 2C2H6 + 7O2 --> 4CO2 + 6H2O
a) How many moles of O2 are required to react with 24 moles of C2H6?
b) How many grams of C2H6 are required to react with 12 moles of O2?
c) How many grams of O2 are required to react with 200g of C2H6?
Show how you got the answer
Answer:
a).
[tex]2 \: moles \: of \: ethane \: react \: with \: 7 \: moles \: of \: oxygen \\ 24 \: moles \: react \: with \: ( \frac{24 \times 7}{2} ) \: moles \\ = 84 \: moles[/tex]
b).
[tex]2 \: moles \: react \: with \: 7 \: moles \\ ( \frac{12 \times 2}{7} ) \: moles \: react \: with \: 12 \: moles \\ = 3 .43 \: moles \\ 1 \: mole \: weighs \: 30 \: g \\ 3.43 \: moles \: weigh \: (3.43 \times 30) \\ = 102.9 \: g[/tex]
c).
746.7 g
What is the frequency of a photon with an energy of 3.26 x 10-19 J?
A. 2.03 x 1014 Hz
B. 4.92 x 1014 Hz
c. 6.10 * 1014 Hz
ОС
D. 5.69 x 1014 Hz
Answer:
B.
[tex]from \: eisteins \: energy \: relation : \\ E = hf \\ h \: is \: plancks \: constant\\ 3.26 \times {10}^{ - 19} = 6.63 \times {10}^{ - 34 } \times f \\ f = \frac{3.26 \times {10}^{ - 19} }{6.63 \times {10}^{ - 34} } \\ f = 4.92 \times {10}^{14} \: Hz[/tex]
Please help on how to solve this problem it’s for isotopes
Mg-19:
#protons = 12
#neutrons = 7
#electrons = 12
Mg-40:
#protons = 12
#neutrons = 28
#electrons = 12
De acuerdo con la primera ley de kihrechhoff determina las intensidades desconocidos así como su sentido. Ayudaaaa:(
oh sorry I'm American I can't understand that
Explanation:
but...thanks for points hehe
If the universe is expanding but the expansion is slowing down, what will the eventual
death of the universe be? *
WHAT IS EXOTHERMIC EXPLAIN
Explanation:
An exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative." Exothermic reactions usually release heat and entail the replacement of weak bonds with stronger ones.
hope it helps
stay safe healthy and happy..Answer:
Exothermic reactions are reactions or processes that release energy, usually in the form of heat or light. In an exothermic reaction, energy is released because the total energy of the products is less than the total energy of the reactants.Explanation:
I hope this helps u have a nice day ☘8 How did reducing the number of
decomposers affect the amount of carbon
dioxide in the ecosystem?
Answer:
Explanation:
As organisms release energy during cellular respiration, carbon dioxide is produced from the carbon in energy storage molecules. ... Carbon dioxide in the biodome decreased because decomposers decreased which means there was a decrease in cellular respiration overall.
Concentrations-
What is the final molarity of HCI if water is added to 17.8 mL of a 5.87 M HCI solution until the volume is 172 mL? (hint: find the moles in the original solution; the final solution will have the same number of moles)
If possible, provide work
PLEASE ANSWER ASAP!!!!
Theoretical yield is the calculated yield of a reaction that’s considered______yield.
A. 75 percent
B. 100 percent
C. 50 percent
D. 25 percent
Answer:
100 Precent
Explanation:
Took the exa,
hola genteee ayuda me pueden decir 5 propiedades físicas y 5 propiedades químicas del ácido sulfúrico porfa es urgente !
Answer:
La respuesta está en la explicación.
Explanation:
Las propiedades físicas son las visibles y medibles que no afectan químicamente la sustancia en cuestión. Las propiedades químicas hacen alusión a la reactividad de la sustancia:
Propiedades físicas ácido sulfúrico:
Líquido a temperatura ambiente.
Densidad: 1.83g/mL
Punto de fusión: 10°C
Punto de ebullición: 337°C
Índice de refracción: 1.397
Propiedades Químicas:
Ácido Fuerte.
Oxidante Fuerte.
Miscible con el agua reaccionando exotérmicamente.
A temperaturas > 30°C produce vapores azufrados.
Estable en concentraciones menores al 98%
