Question

标准状况下密度法求气体摩尔质量M=Vρ=22.4L/molxρ标

Answer 1

m气体质量,V气体体积,Vm气体摩尔体积,ρ气体密度

m = ρ*V

V = n*Vm

代入得m = ρ*n*Vm

将n(物质的量)除到左边得

m/n = ρ*Vm

即 M = ρ*Vm

当标准状况时,M = ρ标 * 22.4L/mol