Multiple Choice
Which statement best describes the law of conservation of mass?
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2. Atoms & Elements
Law of Conservation of Mass
Multiple Choice
Which of the following chemical equations best represents the law of conservation of mass?
A
N_2 + 3H_2 ightarrow 2NH_3 + H_2
B
C + O_2 ightarrow CO
C
Na + Cl_2 ightarrow NaCl_2
D
2H_2 + O_2 ightarrow 2H_2O
Verified step by step guidance1
Step 1: Understand the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction. This means the total number of atoms of each element must be the same on both sides of the chemical equation.
Step 2: Examine each given chemical equation and count the number of atoms of each element on the reactant side and the product side.
Step 3: For the equation \(\mathrm{N_2 + 3H_2 \rightarrow 2NH_3 + H_2}\), count nitrogen and hydrogen atoms on both sides to check if they are balanced.
Step 4: For the equation \(\mathrm{C + O_2 \rightarrow CO}\), count carbon and oxygen atoms on both sides to verify if the equation is balanced.
Step 5: For the equation \(\mathrm{Na + Cl_2 \rightarrow NaCl_2}\), count sodium and chlorine atoms on both sides to see if the number of atoms is conserved.
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