Question

1. which of the following reactions correctly represents the masses of reactants and products in a balanced chemical reaction?

reaction	reactants (g)	products (g)
b	20	22
c	25	22
d	30	28

enter your answer in the box:

Explanation:

Step1: Recall the Law of Conservation of Mass

In a balanced chemical reaction, the total mass of reactants equals the total mass of products (Law of Conservation of Mass). So we check which reaction has reactants' mass equal to products' mass.

Step2: Check each reaction

• Reaction A: Reactants = 15 g, Products = 15 g. \( 15 = 15 \), so mass is conserved.
• Reaction B: Reactants = 20 g, Products = 22 g. \( 20

eq 22 \), mass not conserved.

• Reaction C: Reactants = 25 g, Products = 22 g. \( 25

eq 22 \), mass not conserved.

• Reaction D: Reactants = 30 g, Products = 28 g. \( 30

eq 28 \), mass not conserved.

Answer:

A