Question

1. Look at the chemical equation below. There is a number in the chemical equation

that is not a subscript. What do you think the number 2 on the right side of the
chemical equation represents?

Answer 1

The subscript on the left side indicating the number of atoms of hydrogen and chloride are taking part in the reaction.

While, on the right side the 2 is indicting the formation of two HCI molecules formed after the balancing of the chemical reaction.