MDCAT Chemistry MCQ #2826

24 g of Mg (atomic mass = 24) combines with 16 g of O (atomic mass = 16). What is the empirical formula?

MDCAT Chemistry MCQ #2826

  1. Question 1

    Q1. 24 g of Mg (atomic mass = 24) combines with 16 g of O (atomic mass = 16). What is the empirical formula?

    • A) MgO2
    • B) MgO
    • C) Mg2O
    • D) Mg2O3

    Answer: MgO

    Explanation: Mole ratio Mg:O = 1:1. Option A assumes O:O ratio incorrectly.