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Whelan Whelan
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A gas occupies 22.4 L at STP and 16.5 L at 100°C and 1.75 atm pressure. How many moles of gas did the system gain or lose?
A) 0.06 moles gained
B) 0.03 moles gained
C) 0.03 moles lost
D)  0.06 moles lost
Textbook 

Introductory Chemistry Essentials


Edition: 5th
Author:
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hbutler2hbutler2
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6 years ago
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D

if STP and V = 22.4 L

then n 1= 1 mol

for case 2

PV = nRT

n = PV/(RT) = 1.75*16.5/(0.082*373) = 0.944 mol

Then

dn = 0.944 - 1 = -0.06

it loses 0.06 mol
1
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