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A piece of brass (Cu and Zn) weighs 12.9...

A piece of brass (Cu and Zn) weighs `12.9g` in air. When completely immersed in water, it weighs `11.3g`. Then relative densities of Cu and Zn are `8.9 and 7.1` respectively. The mass of copper in the alloy is

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To find the mass of copper in the brass alloy, we can follow these steps: ### Step 1: Define Variables Let: - \( m_1 \) = mass of copper in the alloy - \( m_2 \) = mass of zinc in the alloy ### Step 2: Write the First Equation ...
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