273K and 760 torr is STP
molar volume at STP is 22.4 L (assuming that ammonia is behaving as an ideal gas.
Use combined gas equation
P1V1 / T1 = P2V2/T2
P1 = 760 mmHg
V1 = 22.4 L
T1 = 273 K
P2 = 763 mmHg
V2 = ? L
T2 = 297 K
Solve for V2
V2 = P1V1T2 / T1P2
= 760 mmHg x 22.4 L x 297 K / (763 mmHg x 273 K)
= 24.3 L (3 sig figs)
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Verified answer
molar volume at STP is 22.4 L (assuming that ammonia is behaving as an ideal gas.
Use combined gas equation
P1V1 / T1 = P2V2/T2
P1 = 760 mmHg
V1 = 22.4 L
T1 = 273 K
P2 = 763 mmHg
V2 = ? L
T2 = 297 K
Solve for V2
V2 = P1V1T2 / T1P2
= 760 mmHg x 22.4 L x 297 K / (763 mmHg x 273 K)
= 24.3 L (3 sig figs)