MDCAT Chemistry MCQ #447

A container holds 44 grams of ethanal. What is the total number of carbon atoms present in this mass of the substance?

MDCAT Chemistry MCQ #447

  1. Question 1

    Q1. A container holds 44 grams of ethanal. What is the total number of carbon atoms present in this mass of the substance?

    • A) 6.02x10^23
    • B) 1.20x10^24
    • C) 1.81x10^24
    • D) 2.41x10^24

    Answer: 1.20x10^24

    Explanation: Ethanal (44g) is one mole, containing two moles of carbon atoms (1.204x10^24). 6.02x10^23 represents only one carbon atom per molecule.