A 0.50-g mixture of `Cu_2O` and CuO contains 0.425 g of Cu. What is the mass of CuO in the mixture?

Explanation

To solve the problem, we need to find the mass of CuO in the mixture of Cu2O and CuO that weighs 0.50 g and contains 0.425 g of copper.

### Step-by-Step Solution:

1. **Define Variables:**
- Let the mass of Cu2O in the mixture be \( x \) grams.
- Therefore, the mass of CuO in the mixture will be \( 0.50 - x \) grams.

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