Question

1. the commercial production of ammonia, nh₃, can be represented by the equation 3h₂ (g) + n₂ (g) → 2nh₃ (g). how many grams of ammonia are produced when 3 grams of hydrogen and 7 grams of nitrogen react completely? 10 grams, because the total mass of the nitrogen reactants are conserved. 14 grams, because the number of nitrogen - based molecules is conserved. 2 grams, because the number of hydrogen - based molecules is conserved. 5 grams, because the total number of molecules of the reactants are conserved. clear all

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 the reactants is equal to the total mass of the products. The reactants here are hydrogen (\(H_2\)) and nitrogen (\(N_2\)) with masses 3 grams and 7 grams respectively.

Step2: Calculate the total mass of reactants

The total mass of the reactants is the sum of the mass of hydrogen and the mass of nitrogen. So, total mass of reactants \(= 3\space g + 7\space g = 10\space g\).

Step3: Determine the mass of the product (ammonia)

Since the total mass of reactants is equal to the total mass of products (from the Law of Conservation of Mass), and the only product here is ammonia (\(NH_3\)), the mass of ammonia produced should be equal to the total mass of the reactants.

Answer:

10 grams, because the total mass of the nitrogen reactants are conserved. (The correct option is the first one with the reasoning based on the Law of Conservation of Mass where total mass of reactants (3g + 7g = 10g) equals total mass of products (ammonia here).)