Determine the mass of the gaseous substance PH3, which occupies a volume of 61.6 liters.

univerkov | November 24, 2020 | education

Given:
V (PH3) = 61.6 L
Vm = 22.4 l / mol
To find:
m (PH3) -?
Decision:
1) the amount of substance
N (PH3) = V (PH3) / Vm = 61.6 liters * 22.4 liters / mol = 2.75 mol
2) molar mass
M (PH3) = 1 * 31 + 3 * 1 = 31 + 3 = 34gram / mol
3) mass
m (PH3) = N (PH3) * M (PH3) = 2.75 mol * 34gram / mol = 93.5gram
Answer: 93.5

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