Question

A compund with a n ampirical of c oh molar mass 88 grams per morel molecular formula

Answer 1

One strategy to use when given the molar mass of the compound is to pick a sample that would correspond to one mole and use it to find the molecular formula without finding the empirical formula first.

In this case, a molar mass of

88 g mol

−

1

tells you that one mole of this compound has a mass of

88 g

.

Use the percent composition of the compound to determine how many grams of each element you'd get in this

88-g

sample. Remember, you can convert between percentages and grams by using a sample of

100 g

.

You will thus have