Question

4.5gram of alloy of coppor and zinc contains 3.5gram of coppor what weight of coppor will be there in18.9 of alloy

Answer 1

Amount of copper in 4.5 g = 3.5 g
Amount of copper in 1 g = 3.5/4.5 g
Amount of copperin 18.9 g = 18.9 * 3.5/4.5 = 14.7 g