How can an empirical formula be interpreted?
For example, a question has been given to you.
Example question: Calculate the empirical formula of a compound that contains 11% hydrogen and 89% oxygen by mass.
Assume that percentages are masses.
Assume that 100 grams contains 11 grams of hydrogen and 89 grams of oxygen.
Use the formula
The number of moles (n) in hydrogen is:
n = 11 grams
The number of moles (n) in oxygen is:
n = 89 grams
Divide all number of moles (n) by the SMALLEST, then round to nearest whole number.
Hydrogen (H): 11 moles
Oxygen (O): 5.6 moles
Round to whole numbers, and assign as subscripts.
The empirical formula of this compound is