Calculate the mass of coal required to produce 20g of carbon monoxide (4).

Given:
m (CO2) = 20 g.
interaction of C with O2;
Find: m (C) -?
Decision:
1) Let’s write the reaction equation:
C + O2 = CO2; When coal C is burned, carbon dioxide CO2 (carbon monoxide) is formed.
From the reaction – 1 mol of CO2 is consumed per 1 mol of C;
2) Find v (CO2), v (CO2) = 20 g / (12 + 16 * 2) = 20 g / (12 + 32) g / mol = 0.45 mol.
Since v (C): v (CO2) = 1: 1, then v (CO2) = v (C) = 0.45 mol;
4) M (C) = 12 g / mol.
m (C) = 12 g / mol * 0.45 mol = 5.4 g.
Answer: To generate 20 g of CO2, you need to burn 5.4 g of C coal.