Given the balanced equation, calculate the mass of product that can be prepared from 2.36 g of zinc metal.
2zn + o2 2zno

1) Balanced chemical reaction: 2Zn + O2 -> 2ZnO

2) molar ratios: 2 mol Zn: 2mol ZnO

3) number of moles of Zn, n = grams / molar mass

n = 2.36 g / 65.39 g/mol = 0.036 mol of Zn

4) Given that a number of moles of Zn that react produces the same number of moles of ZnO, the number of mols of ZnO is 0.036

5) Convert to grams using the molar mass of ZnO

molar mass of ZnO = 65.39 g/mol + 16g/mol = 81.39 g/mol

=> grams of ZnO = 0.036 mol * 81.39 g/mol = 2.94 grams

2.94 grams

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