Multiple Choice
Which property of matter is conserved in chemical reactions and demonstrated by balanced chemical equations?
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2. Atoms & Elements
Law of Conservation of Mass
Multiple Choice
Which of the following chemical equations correctly models the law of conservation of mass?
A
N_2 + 3H_2 ightarrow 2NH_3 + H_2
B
C + O_2 ightarrow CO
C
2H_2 + O_2 ightarrow 2H_2O
D
Na + Cl_2 ightarrow NaCl_2
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 number of atoms of each element must be the same on both sides of the equation.
Step 2: For each given chemical equation, count the number of atoms of each element on the reactant side and compare it to the number on the product side.
Step 3: Check the first equation: \(N_2 + 3H_2 \rightarrow 2NH_3 + H_2\). Count nitrogen and hydrogen atoms on both sides to see if they balance.
Step 4: Check the second equation: \(C + O_2 \rightarrow CO\). Count carbon and oxygen atoms on both sides to verify if the equation is balanced.
Step 5: Check the third equation: \(2H_2 + O_2 \rightarrow 2H_2O\). Count hydrogen and oxygen atoms on both sides to confirm if the equation obeys the conservation of mass.
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