A certain ore is 23.2% nickel by mass. How many kilograms of this ore would you need to dig up to have 85.0 g of nickel?

Question

A certain ore is 23.2% nickel by mass. How many kilograms of this ore would you need to dig up to have 85.0 g of nickel?

Answer 1

85/.232 divided by 1000

= about 0.3664 kilograms

they're about 1/4 nickel, so you need about 4 times 85 or a little over 340 g

1 kg = 1000 g, so divide that by 1000, move the decimal point to the left 3 times to get 0.340 approximately. Plug it into a calculator to get a closer approximation: 0.3664 kg