Question

What mass of CO was used up in the reaction with an excess of oxygen gas if 24.7g of carbon dioxide is formed?

Answer 1

Hello!

The mass of CO that was used up in the reaction with an excess of oxygen gas if 24,7 g of Carbon Dioxide is formed was 15,72 g

The chemical equation for the reaction in this exercise is the following one:

2 CO + O₂ → 2CO₂

Now, we will apply the following conversion factor to go from grams of Carbon Dioxide to grams of Carbon monoxide using the molar masses, and reaction coefficients:

$24,7 g CO_2* \frac{1 mol CO_2}{44,01 g CO_2} * \frac{2 moles CO}{2 moles CO_2}* \frac{28,01 g CO}{1 mol CO}=15,72 g CO$

Have a nice day!