Question

Brass is made up of copper and zinc. 100 grams of brass contains 20 grams of zinc.

A) Workout the weight of zinc in 60 grams of brass.
Brass contains 4 parts by weight of copper to 1 part by weight of zinc.
B) Work out the weight of copper in 350 grams of brass.

Answer 1

A. 12 grams Zn

B. 280 g of copper.

Explanation:

100 grams of brass

20 grams of zinc

100 grams of brass has 20 grams of Zn.

20/100 = 0.200 Zn 20% Zn and 80% copper.

A. (60 g brass)*(0.2) = 12 grams Zn

B. (350 g brass)*(0.80) = 280 g of copper.