Question

Which equation illustrates conservation of mass?

O 1 H2 + 1 O2 + 2 H2O
O 1 H2 + 1 2 + 1 H2O
O 1 H2 + 1 Cl2 +1HCI
O 1 H2 + 1 Cl2 + 2HCI

Answer 1

1H₂ + 1Cl₂ → 2HCl

Step-by-step explanation:

The reaction that illustrates the law of conservation of mass is shown below:

1H₂ + 1Cl₂ → 2HCl

According to the law of conservation of mass "in a chemical reaction, matter is neither created nor destroy but atoms are rearranged".

Therefore, we are expected to the end a reaction with the amount of substance we start with.

Element H Cl

Reactants 2 2

Products 2 2

We see that number of atoms on both sides are the same.