Calcium oxide can be prepared by heating calcium metal in oxygen according to the reaction: 2Ca+ O(2) -- 2CaO. How many grams of calcium would be needed to produce 15.0 grams of calcium oxide?

Question

Calcium oxide can be prepared by heating calcium metal in oxygen according to the reaction: 2Ca+ O(2) --> 2CaO. How many grams of calcium would be needed to produce 15.0 grams of calcium oxide?

DrBob222 · Answer

mols CaO = grams/molar mass. Convert mols CaO to mols Ca using the coefficients in the balanced equation. Then g Ca = mols a x atomic mass Ca.