What weight of zinc would be required to produce enough hydrogen to reduce completely 7.95 g of CuO.

Explanation

To solve the problem of determining the weight of zinc required to produce enough hydrogen to completely reduce 7.95 g of CuO, we can follow these steps:

### Step-by-Step Solution:

1. **Write the Relevant Chemical Reactions**:
- The first reaction involves zinc reacting with hydrochloric acid to produce zinc chloride and hydrogen gas:
\[
\text{Zn} + 2\text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2
...