Multiple Choice
According to the Law of Conservation of Mass, what happens to the atoms of the reactants during a chemical reaction?
74
views
2. Atoms & Elements
Law of Conservation of Mass
Multiple Choice
Which of the following chemical equations represents conservation of atoms?
A
N2 + 2 H2 → NH3
B
Na + Cl2 → NaCl2
C
2 H2 + O2 → 2 H2O
D
C + O2 → CO
Verified step by step guidance1
Understand that the law of conservation of atoms states that in a chemical reaction, the number of each type of atom must be the same on both sides of the equation.
For each given equation, count the number of atoms of each element on the reactant side and compare it to the number on the product side.
For example, in the equation \(\mathrm{N_2 + 2\ H_2 \rightarrow NH_3}\), count nitrogen and hydrogen atoms on both sides to check if they are equal.
Repeat this process for each equation: \(\mathrm{Na + Cl_2 \rightarrow NaCl_2}\), \(\mathrm{2\ H_2 + O_2 \rightarrow 2\ H_2O}\), and \(\mathrm{C + O_2 \rightarrow CO}\).
Identify which equation has the same number of atoms of each element on both sides, indicating conservation of atoms.
Related Videos
Related Practice
