According to the Law of Conservation of Mass, the total mass of the reactants must equal the total mass of the products. In this case, you have the following:
- Mass of carbon (C) = 24 g
- Mass of carbon dioxide (CO2) produced = 88 g
To find the mass of dioxygen (O2) in the reactants, you can use the following equation:
\[ \text{Mass of reactants} = \text{Mass of products} \]
The mass of dioxygen (O2) can be found using:
\[ \text{Mass of O2} = \text{Mass of CO2} - \text{Mass of C} \]
So:
\[ \text{Mass of O2} = 88 , \text{g} - 24 , \text{g} = 64 , \text{g} \]
Therefore, the mass of dioxygen (O2) in the reactants is 64 g.