Correct the following statements by changing the underlined part of the sentence :
Brass is an alloy of `ul("copper and tin")`.

Explanation

To correct the statement "Brass is an alloy of copper and tin," we need to identify the correct components of brass.

### Step-by-Step Solution:

1. **Identify the Incorrect Part**: The statement mentions "copper and tin" as the components of brass. We need to change this part.

2. **Research the Composition of Brass**: Brass is actually an alloy primarily composed of copper and zinc, not copper and tin.

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