A certain ore is 28.0 % nickel by mass. How many kilograms of this ore would you need to dig up to have 85.0 g of nickel?

Answer 1

In each kilogram of ore, you would have .28 x 1 kg = .28 kilograms of nickle or .28 x 1000 grams = 280 grams

So, 85/280 = .3036 which means you need only to dig .3036 kilograms of ore