Question

Chalk contains 10%calcium,3%carbon and12%oxugen. Find the amount (in gram)of each of these compound in 1kg of chalk

Answer 1

1 kg =1000th

If chalk contains 10% Calcium then

10/1000=100g of calcium

3% carbon then

3/1000 = 33.3333....g of carbon

12% oxygen then

12/1000 = 56.66666..... of oxygen

I am class 5

HTH