Magnesium weighing 2.4 g interacts with oxygen. Determine the mass of oxygen reacted?

univerkov | December 21, 2020 | education

2Mg + O2 → 2MgO
n (Mg) = m (Mg) / M (Mg) = 2.4 g / 24 g / mol = 0.1 mol
n (O2) = n (Mg) / 2 = 0.1 mol / 2 = 0.05 mol
m (O2) = n (O2) * M (O2) = 0.05 mol * 32 g / mol = 1.6 g

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