What is the mass of 0.25 mol of CaO? (molar mass 56 g/mol)

Answer and explanation

Correct answer: C. 14 g

  1. Step 1: Mass = moles × molar mass. Step 2. 0.25 × 56 = 14 g. Answer: 14 g. Why not the others: 224 g is what you get if you divide the molar mass by the moles. 56.25 g is what you get if you add the numbers. 1.4 g is what you get if you misplace the decimal point.

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