A substance is known to contain 2.00 g of carbon for every 5.33 g of oxygen.How many grams of carbon will be present in 55.0 g of this substance?
A)15.0 g
B)27.5 g
C)20.6 g
D)10.3 g

Question

Quizplus · Accepted Answer

The ratio of carbon to the total mass (carbon + oxygen) is 2.00 g / (2.00 g + 5.33 g) = 2.00 / 7.33. To find the amount of carbon in 55.0 g of the substance, multiply this ratio by 55.0 g: (2.00 / 7.33) * 55.0 g ≈ 15.0 g.

A Substance Is Known to Contain 2