Chapter 3, Problem 55A

Interpretation Introduction

Interpretation:

The mass of glucose is 180 g and that of oxygen is 192 g. They react to produce water and carbon dioxide gas. The mass of water produced is 108 g. The mass of carbon dioxide produced should be calculated.

Concept introduction:

According to law of conservation of mass, total mass of reactant and product in a chemical reaction remains the same before and after the completion of the reaction.

Answer to Problem 55A

264 g.

Explanation of Solution

For the given reaction, reactants are glucose and oxygen and products are water and carbon dioxide gas.

According to the law of conservation of mass, the total mass of reactants is equal to the products after the completion of the reaction.

Thus,

$m_{\text{glucose}}+m_{\text{oxygen}}=m_{\text{water}}+m_{\text{carbon dioxide}}$

Putting the values,

$\begin{array}{l}180+192=108+m_{\text{carbon dioxide}}\\ m_{\text{carbon dioxide}}=180+192-108\\ =264\text{ g}\end{array}$

Conclusion

Therefore, the mass of carbon dioxide produced is 264 g.