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Harlamova29_29 [7]
3 years ago
13

What is a correct expression of the law of conservation mass

Chemistry
1 answer:
nekit [7.7K]3 years ago
5 0
Law of conservation of mass- The total mass after a chemical reaction is exactly the same as the mass before.
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A 1.04L sample of gas of 759 mm Hg pressure is expanded
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Answer:

P2 = 352 mm Hg (rounded to three significant figures)

Explanation:

PV = nRT

where P is the pressure,

V is the volume,

n is the moles of gas,

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and T is the temperature.

We must relate this equation to a sample of gas at two different volumes however. Looking at the equation, we can relate the change in volume by:

P1V1 = P2V2

where P1 is the initial pressure,

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and V2 is the final volume.

Looking at this relationship, pressure and volume have an indirect relationship; when one goes up, the other goes down. In that case, we can use this equation to solve for the new pressure.

P1V1 = P2V2

(759 mm Hg)(1.04 L) = P2(2.24 L)

P2 = 352 mm Hg (rounded to three significant figures)

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