Question

0.24 gram sample of a compound of Oxygen and boron was found by analysis to contain 0.0 96 gram of boron and 0.1 44 gram of oxygen calculate the percentage composition of the compound by mass

Answer 1

Mass of boron as given = 0.096 g
Mass of oxygen as given = 0.144 g
Mass of sample as given = 0.24 g
∴ Percentage of boron by weight in the compound = (0.096 ÷ 0.24 ) x 100
                                                                                = 40%
∴ Percentage of oxygen by weight in the compound = (0.144 ÷ 0.24) x 100
                                                                                   = 60%

i hope it will help you
regards

Answer 2

Hi dear here is your answer.