Question

an alloy consists of 30% zine ,45% nickel and rest copper .find the mass of copper in 800g of the alloy ?

Answer 1

Zinc = 30%
Nickel = 45%
Copper = 100 – (30 + 45) %
= (100 – 75)%
=25%

The mass of copper in 800g of alloy
= 25/ 100 × 800 g
= 200g

Hope it'll help...:)