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Sphinxa [80]
3 years ago
10

A sample of gas occupies a volume of 120.0 mL at a pressure of 0.75 atm and a temperature of 295 K. What will the volume be at a

pressure of 1.25 atm and a temperature of 345 K?
a) 48 mL
b) 4 mL
c) 8 mL
d) 84 mL
Chemistry
1 answer:
AnnZ [28]3 years ago
8 0
The answer is D// 84Ml
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30ml of a 2.50 M hydrochloric acid solution is required to make 100.0 mL of a 0.750 M solution.

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HCl is an acid which is made up of hydrogen and chlorine gas.

By the formula of dilution

M1V1 = M2V2

where V1 = 2.50 m

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M1 × 2.50 m = 100.0 × 0.750 m

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Thus, the M1 is 30 ml option a is correct.

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Answer: C) 0.020 m

Explanation:

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Mole fraction of CO_2 is = 3.6\times 10^{-4} i.e.3.6\times 10^{-4}  moles of CO_2 is present in 1 mole of solution.

Moles of solute (CO_2) = 3.6\times 10^{-4}

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Thus  approximate molality of CO_2 in this solution is 0.020 m

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Answer:

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Answer:

Please see the attachments

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