## Answers

The solid zinc lost mass because some of it reacted with the hydrochloric acid to form zinc chloride.

#### Explanation:

The reaction between zinc and hydrochloric acid produces zinc chloride and hydrogen gas. This is a single replacement reaction in which zinc replaces the hydrogen in hydrochloric acid. The balanced equation is:

The original zinc has lost mass because some of it reacted with the hydrochloric acid to form zinc chloride.

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