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rewona [7]
3 years ago
7

When an atom becomes an ion does its mass number change?

Chemistry
1 answer:
aniked [119]3 years ago
8 0
Its mass number does not change because the atom is losing or gaining electrons, so the change is almost not measurable because the electrons weigh so little. 

In other words: its mass number does not change

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A sample of sulfur hexafluoride gas occupies a volume of 9.10 L at 198ÁC. Assuming that the pressure remains constant, what temp
alexandr1967 [171]
  As we know that
<span>V1/T1 = V2/T2 
V1 = 9.10 L 
T1 = 471 K 
V2 = 2.50 L 
T2 = 2.5 x 471 / 9.10 = 129.3 K 
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hope it helps</span>
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Answer:

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3 years ago
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If a gas has a volume of 750 mL at 25oC, what would the volume of the gas be at 55oC?
blagie [28]

Answer:

The answer to your question is     V2 = 825.5 ml

Explanation:

Data

Volume 1 = 750 ml

Temperature 1 = 25°C

Volume 2= ?

Temperature 2 = 55°C

Process

Use the Charles' law to solve this problem

                V1/T1 = V2/T2

-Solve for V2

                V2 = V1T2 / T1

-Convert temperature to °K

T1 = 25 + 273 = 298°K

T2 = 55 + 273 = 328°K

-Substitution

                V2 = (750 x 328) / 298

-Simplification

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-Result

                V2 = 825.5 ml

             

7 0
3 years ago
If the acetylene tank contains 37.0 mol of C2H2 and the oxygen tank contains 81.0 mol of O2, what is the limiting reactant for t
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Explanation:

Limiting reagent is the reagent which limits the formation of the product.

Excess reagent is the reagent which is present in excess in a chemical reaction.

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2C_2H_2(g)+5O_2(g)\rightarrow 4CO_2+2H_2O

By Stoichiometry,

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So, 81 moles of oxygen gas will react with = \frac{2}{5}\times 81 = 32.4 moles of acetylene.

As, the required amount of acetylene is less than the given amount. So, it is considered as an excess reagent and oxygen gas is the limiting reagent.

8 0
4 years ago
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3 years ago
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