One mole of which gas has the greatest density at STP? A)Kr B)CO₂ C)Ar D)All three gases have the same density.

Question

Quizplus · Accepted Answer

At STP (standard temperature and pressure), one mole of any gas occupies a volume of 22.4 L. The density of a gas is directly proportional to its molecular weight. Among the given gases, Kr (krypton) has the highest molecular weight (83.80 g/mol) compared to COS (carbon oxysulfide) and Ar (argon). Therefore, one mole of Kr gas will have the highest density at STP.

One Mole of Which Gas Has the Greatest Density at STP