Question

An alloy consists 35% zinc,45% nickel and the rest is copper. Find the mass of copper in 400g of alloy

Answer 1

Percentage of zinc = 35%

Percentage of nickel = 45 %

Total percentage = 45 + 35 = 80 %

Percentage of copper = 100 - 80 = 20%

Mass of copper = 20 % of 400 g

= 20/100 ×400

Answer = 80 g