Question

chalk contains 3% of carbon, 10% of calcium and 12% of oxygen. find the amount in grams of each of the substances in 1 kg of Chalk

Answer 1

Given, Chalk is 1 kg = 1000 g


Amount of chalk in carbon = 3/100 * 1000

                                             = 30g

Amount of Calcium in chalk = 10/100 * 1000
             
                                                = 100g

Amount of Oxygen in chalk = 12/100 * 1000

                                                = 120 g