MDCAT Chemistry MCQ #699

A student reacts 0.2 moles of ethyl bromide with excess magnesium in dry ether. What is the theoretical mass of the Grignard reagent produced?

MDCAT Chemistry MCQ #699

  1. Question 1

    Q1. A student reacts 0.2 moles of ethyl bromide with excess magnesium in dry ether. What is the theoretical mass of the Grignard reagent produced?

    • A) 21.66 g
    • B) 26.66 g
    • C) 31.66 g
    • D) 13.33 g

    Answer: 26.66 g

    Explanation: Ethyl magnesium bromide has a molar mass of 133.3g/mol; 0.2 moles equals 26.66g. Option C fails because it ignores the ethyl group mass.