Question

Using this equation: CH4 + 2 O2 --> CO2 + 2 H2OWhen you start with 38 grams of methane (CH4), how many moles of carbon dioxide do you produce?

Answer 1

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

Firstly we will convert the mass of methane to moles of methane:

$\begin{gathered} _nCH_4=\frac{mass}{molar\text{ }mass} \\ \\ _nCH_4=\frac{38\text{ }g}{16.04\text{ }gmol^{-1}} \\ _nCH_4=2.37mol \end{gathered}$

Based on the mole ratio 1 mole of methane produce 1 mole of carbon dioxide.

Answer: 2.37mole of methane produce 2.37mole of carbon dioxide.