# How do you calculate the empirical formula of a compound formed from 3% #C#, 0.3% #H#, and 96.7% #I#?

##### 1 Answer

Apr 27, 2016

Assume that 100 grams contains:

3 grams of C, 0.3 grams of H, and 96.7 grams of I.

Next step, calculate the number of moles of each atom using the formula

n = number of moles

m = mass of substance

M = molar mass

The number of moles (n) for:

Carbon = 3 grams

Hydrogen = 0.3 grams

Iodine = 96.7 grams

Then, divide all number of moles BY THE SMALLEST above and round to nearest whole number.

Carbon = 0.25

Hydrogen = 0.30

Iodine = 0.76

Assign them as subscripts.

Therefore, the empirical formula is