Question

if reaction starts with 20g of reactants it should produce
a total of 30g of products
a total of 20g of products
a total of 40g of products
a total of 10g of products

Explanation:

Step1: Recall the Law of Conservation of Mass

The Law of Conservation of Mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. This is because matter is neither created nor destroyed in a chemical reaction, only rearranged.

Step2: Apply the Law to the Given Problem

We are given that the reaction starts with 20g of reactants. According to the Law of Conservation of Mass, the total mass of the products formed should be equal to the total mass of the reactants. So, if the reactants have a total mass of 20g, the products should also have a total mass of 20g.

Answer:

B. a total of 20g of products (assuming the options are labeled A, B, C, D with B being "a total of 20g of products")