Question

question 1 (10 points) rank the following in order of decreasing rate of effusion. f₂ sf₆ co kr co > f₂ > sf₆ > kr kr > co > sf₆ > f₂ sf₆ > kr > f₂ > co co > f₂ > kr > sf₆ f₂ > kr > co > sf₆

Explanation:

Step1: Recall Graham's Law

Graham's Law: Rate ∝ 1/√(molar mass)

Step2: Calculate molar masses

• CO: 12+16=28 g/mol
• F₂: 2×19=38 g/mol
• Kr: 83.8 g/mol
• SF₆: 32+(6×19)=146 g/mol

Step3: Order by decreasing rate

Lower molar mass → higher rate: CO > F₂ > Kr > SF₆

Answer:

CO > F₂ > Kr > SF₆