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Nitella [24]
3 years ago
9

Which of the following undergoes change during a chemical reaction? A. atomic masses of elements in reactants B. element identit

ies of atoms in reactants C. total number of electrons in reactants D. chemical bonds between atoms in reactants.
Chemistry
1 answer:
Virty [35]3 years ago
8 0

Chemical bonds between atoms in reactants undergo change during a chemical reaction.

 

<span>The substance (or substances) initially involved in a </span>chemical reaction<span> <span>are called reactants or reagents. </span></span>Chemical reactions<span> <span>are usually characterized by a </span></span>chemical<span> change, and they yield one or more products, which usually have properties different from the reactants.</span>

 

The correct answer between all the choices given is the last choice or letter D. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

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A sample of helium gas has a pressure of 1.20 atm at 22°c. at what celsius temperature will the helium reach a pressure of 2.00
sukhopar [10]
Gay-Lussac's law gives the relationship between pressure and temperature of a gas.
it states that for a fixed amount of gas of constant volume pressure is directly proportional to temperature. 
P/T = k
where P - pressure, T - temperature and k - constant 
\frac{P1}{T1} =  \frac{P2}{T2}
where parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation.
temperature should be in the kelvin scale,
T1 = 22 °C + 273 = 295 K
substituting the values in the equation 
\frac{1.20atm}{295 K}  =  \frac{2.00 atm}{T}
T = 492 K
new temperature - 492 - 273 = 219 °C
5 0
3 years ago
Which substance contains a bond with the greatest ionic character?
agasfer [191]
Hello!

The correct answer is 1. KCI.

I really hope this helped you out! c:
4 0
3 years ago
Identify the substances in this reaction:
lukranit [14]

Answer:

is an aqueous reactant

is a liquid product

is a gaseous product

Explanation:

H_2CO_3 ⇔ CO_2 + H_2O

Hydrogen carbonate dissocates to form carbon dioxide and water. The acid (hydrogen carbonate) is in aqueous form and it dissociates to water (liquid) and carbon dioxide (a gas). It is also seen that the hydrogen carbonate is on the reactant side and it dissociates to produce water and carbon dioxide.

WH_2CO_3<u> is an aqueous reactant</u> (a reactant undergoes changes in a chemical reaction

<u />H_2O<u> is a liquid product</u> (product refers to the species produced from  chemical reaction)

<u />CO_2<u> is a gaseous product</u>

6 0
2 years ago
 Some
Misha Larkins [42]
<span>density is defined as mass per volume.. so 94 mL makes no sense.</span>
7 0
3 years ago
Heat energy is always released during what type of process?
Alinara [238K]
In the exothermic process.. Have a great day!
4 0
3 years ago
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