States Of Matter

Effusion rates are inversely proportional to the square root of the molar masses of the gases. Given that the molar ratio of gases is 1:2:3, the effusion rate will follow this ratio.

Step 1: Understand the relationship between molecular weight and density At STP (Standard Temperature and Pressure), the density of a gas is directly related to its molar mass. The greater the molar mass, the higher the density. Step 2: Molar masses of the gases The molar masses of the gases are as follows: - : , - : , - : , - : . Step 3: Compare the densities - has the highest molar mass, which means it will have the highest density at STP. Answer: The correct answer is option (3): .