Question

chalk contains three percent of carbon 10% of calcium and 12% of oxygen find the amount in grams of each of these substance 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

Hope this helps!