A substance contains 3.024 g hydrogen, 30.97 g phosphorus, and 64.00 g oxygen. How many grams of oxygen are in an 85.00-g sample of the substance?

Question

Quizplus · Accepted Answer

To find the grams of oxygen in an 85.00-g sample, first determine the total mass of the original substance: 3.024 g (H) + 30.97 g (P) + 64.00 g (O) = 97.994 g. The fraction of oxygen in the substance is 64.00 g / 97.994 g. To find the amount of oxygen in an 85.00-g sample, multiply this fraction by 85.00 g: (64.00/97.994) * 85.00 ≈ 55.51 g.

A Substance Contains 3