Question

4.5 g of an alloy of copper and zinc contains 3.5 g of copper . What weight of copper will there be in 18.9 g of the alloy ?​

Answer 1

Step-by-step explanation:

Given,

4.5 g of alloy contains 3.5 g of Cu

The percentage of Cu in the alloy = 3.5/4.5 × 100

=77.77%

So in 18.9 g of alloy too has 77.77% of Cu must be present

Hence, 18.9 × 77.77% = 14.7

Therefore 14.7 g of cu is in 18.9 g of alloy