MDCAT Chemistry MCQ #4550

A researcher needs 30g of butane (C4H10) to synthesize a new compound. How many moles of butane are needed?

MDCAT Chemistry MCQ #4550

  1. Question 1

    Q1. A researcher needs 30g of butane (C4H10) to synthesize a new compound. How many moles of butane are needed?

    • A) 0.4 moles
    • B) 0.5 moles
    • C) 0.6 moles
    • D) 0.7 moles

    Answer: 0.5 moles

    Explanation: Molar mass of butane (C4H10) is 58 g/mol; hence 30g / 58 g/mol = 0.517 moles, rounded to 0.52 moles. Option B is the closest.