Understanding Empirical Formulas Quiz

A compound is found to contain 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. What is the empirical formula of the compound?

A sample contains 70% iron and 30% oxygen by mass. What is the empirical formula of the compound?

A compound is composed of 85.7% carbon and 14.3% hydrogen by mass. What is the empirical formula of the compound?

A compound is made up of 36.8% nitrogen and 63.2% oxygen by mass. What is the empirical formula of the compound?

A compound contains 92.3% carbon and 7.7% hydrogen by mass. What is the empirical formula of the compound?

A compound is composed of 27.3% carbon and 72.7% oxygen by mass. What is the empirical formula of the compound?

A compound contains 26.7% phosphorus and 73.3% chlorine by mass. What is the empirical formula of the compound?

A compound is made up of 40% sulphur and 60% oxygen by mass. What is the empirical formula of the compound?

A compound contains 43.7% potassium, 15.2% nitrogen, and 41.1% oxygen by mass. What is the empirical formula of the compound?

A compound is composed of 52.2% carbon, 13.0% hydrogen, and 34.8% oxygen by mass. What is the empirical formula of the compound?