Question

if 2 grams of substance a react completely with 3 grams of substance b, what must be t 2a + 1b —→ 3c + 1d

b. 2 moles of substance a are used

c. 4 grams of products are produced

d. 4 moles of products are produced

e. 5 grams of products are produced

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.

Step2: Calculate the total mass of reactants

Given that 2 grams of substance A react with 3 grams of substance B. So the total mass of reactants is \(2\space g + 3\space g= 5\space g\).

Step3: Determine the mass of products

By the Law of Conservation of Mass, the total mass of products (C and D) must be equal to the total mass of reactants. So the mass of products should be 5 grams.

Answer:

E. 5 grams of products are produced