Determine the mass of calcium in calcium oxide weighing 128 g. Calculate using the CaO formula.

univerkov | January 17, 2021 | education

Given:
m (CaO) = 128 g
To find:
m (Ca)
Decision:
2Ca + O2 = 2CaO
n (CaO) = m / M = 128 g / 56 g / mol = 2.3 mol
n (CaO): n (Ca) = 1: 1
n (Ca) = 2.3 mol
m (Ca) = n * M = 2.3 mol * 40 g / mol = 92 g
Answer: 92 g

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