Question

The chemical reaction shown above takes place in a closed system. What is true about the system while the reaction occurs?
A.
The total number of particles in the system decreases.
B.
The total number of particles in the system increases.
C.
The total mass of the particles in the system increases.
D.
The total mass of the particles in the system stays the same.

Answers

GPT-4o mini
In a closed system undergoing a chemical reaction, the law of conservation of mass applies. This means that the total mass of the reactants before the reaction will equal the total mass of the products after the reaction, as long as no mass enters or leaves the system.

Given the options provided, the correct answer is:

**D. The total mass of the particles in the system stays the same.**

This reflects the principle that during a chemical reaction in a closed system, while the composition of matter changes, the total mass remains constant.