Flask with greater average speed for the molecules — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

Average molecular speed is c_avg ∝ √(T/M). For A ($H_2$): √(300/2) = √150 ≈ 12.2. For B ($CH_4$): √(600/16) = √37.5 ≈ 6.1. For C ($O_2$): √(900/32) = √28.125 ≈ 5.3. Thus, Flask A has the highest average molecular speed.