a sample of gas has a density of 1.96g/l at STP.Determine its molar mass.

a sample of gas has a density of 1.96g/l at STP.Determine its molar mass.
a sample of gas has a density of 1.96g/l at STP.Determine its molar mass.

a sample of gas has a density of 1.96g/l at STP.Determine its molar mass.
1.96克密度/升,STP下1mol气体的体积为22.4L
所以1mol该气体质量为：1.96g/L×22.4L=43.904g≈44g
所以该气体摩尔质量为44g/mol

根据经验这是CO2
计算的话，标况下1.96g/l,1摩尔就是1.96*22.4=43.904g

44.二氧化碳