According to this equation C(s)+ O2(g)= CO2(g), what mass of oxygen is required to produce 22g of carbon dioxide?

Answer 1

MW-CO2 = 44.01 g/mol

MW-02 = 32 g/mol

The equation above is already balanced, 1 mol of O2 is needed to produce 1 mol of CO2.

Since you have 22 g of CO2, this equals to 0.5 mol of CO2. 22g * (1 mol CO2/44.01 g CO2 = 0.499 mol CO2

Use the stoichiometric equation, 1 mol CO2: 1 mol O2.

(0.499 mol CO2) (1 mol O2/1 mol CO2) = 0.499 mol O2

0.499 mol O2 (32 g O2/ 1 mol 02) = 15.99 g O2