Question

1. Chalk contains 40% calcium
12% carbon and rest oxygen
no What is the amount of
oxygen in & kg of chalk​

Answer 1

Step-by-step explanation:

Total percent of calcium and carbon equals 40 + 12 equals 52 percent.... Remaining percentage of oxygen equals 100 - 52 equals 48 percent.... Amount of oxygen in 8 grams of chalk equals 48 percent of 8 which is equal to 3.84 grams of oxygen