read the passage and answer the following question(s). water formation water (h₂o) is a compound required…

read the passage and answer the following question(s). water formation water (h₂o) is a compound required for survival by living organisms. the diagram below shows the chemical reaction of hydrogen gas (h₂) with oxygen gas (o₂) to form water (h₂o). chemical reaction forming water 2h₂ + o₂ → 2h₂o choose the statement that best compares the mass of the products to the mass of the reactants. a. the number of hydrogen atoms and oxygen atoms changes during the reaction, so the mass changes during the reaction. b. the number of hydrogen atoms and oxygen atoms changes during the reaction, but the mass does not change during the reaction. c. the number of hydrogen atoms and oxygen atoms is the same before and after the reaction, but the mass changes during the reaction. d. the number of hydrogen atoms and oxygen atoms is the same before and after the reaction, so the mass does not change during the reaction.

read the passage and answer the following question(s). water formation water (h₂o) is a compound required for survival by living organisms. the diagram below shows the chemical reaction of hydrogen gas (h₂) with oxygen gas (o₂) to form water (h₂o). chemical reaction forming water 2h₂ + o₂ → 2h₂o choose the statement that best compares the mass of the products to the mass of the reactants. a. the number of hydrogen atoms and oxygen atoms changes during the reaction, so the mass changes during the reaction. b. the number of hydrogen atoms and oxygen atoms changes during the reaction, but the mass does not change during the reaction. c. the number of hydrogen atoms and oxygen atoms is the same before and after the reaction, but the mass changes during the reaction. d. the number of hydrogen atoms and oxygen atoms is the same before and after the reaction, so the mass does not change during the reaction.

Answer

Explanation:

Step1: Recall law of conservation of mass

In a chemical reaction, mass is conserved. This means the total mass of reactants equals the total mass of products because atoms are neither created nor destroyed, only rearranged.

Step2: Analyze the water - formation reaction

The reaction $2H_2+O_2\rightarrow 2H_2O$ has 4 hydrogen atoms and 2 oxygen atoms on the reactant side and also 4 hydrogen atoms and 2 oxygen atoms on the product side. Since the number of each type of atom is the same before and after the reaction, the mass does not change.

Answer:

D. The number of hydrogen atoms and oxygen atoms is the same before and after the reaction, so the mass does not change during the reaction.