Question

CH4 (g)+ 202(8)->CO2(g) + 2H2O(1)If 79.7 grams of O2 react with excess CH4, how many grams of CO2 result?

Answer 1

Given the reaction:

$CH_4+2O_2\to CO_2+2H_2O$

We want to find the number of grams of CO2 produced from 79.7 grams of O2.

Using stoichiometry, we obtain:

$79.7gO_2\cdot\frac{1molO_2}{32gO_2}\cdot\frac{1molCO_2^{}}{2molO_2}\cdot\frac{44gCO_2}{1molCO_2}=54.79gCO_2$

Therefore, 54.79g of CO2 are produced.