What is the molar mass of 81.5g of gas exerting a pressure of 1.75atm on the walls of 4.92L container at 307K?
回答 (1)
2016-06-21 1:52 pm
✔ 最佳答案
Mass, m = 81.5 gPressure, P = 1.75 atm
Volume, V = 4.92 L
Absolute temperature, T = 307 K
Gas constant, R = 0.0821 atm L / (mol K)
Molar mass, M = ? g/mol
PV = nRT
PV = (m/M)RT
M = mRT/(PV)
Molar mass, M = (81.5 g) × [0.0821 atm L / (mol K)] × (307 K) / [(1.75 atm) × 4.92 (L)] = 239 g/mol
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