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Empirical and Molecular Formula

Last updated almost 8 years ago

5 questions

Note from the author:

Empirical and Molecular Formula Formative

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Question 1

1.

Calculate the percent by mass of oxygen in calcium hydroxide.

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Question 2

2.

An unknown has an empirical formula of C2OH4 and a molar mass of 88.0 g/mole. What is the molecular formula of this compound?

Question 3

3.

If a compound contains only 0.100 moles carbon and 0.300 moles hydrogen (no other elements), what is the empirical formula of the compound?

Question 4

4.

State one example of a compound (ionic or covalent, your choice) whose IUPAC formula is both the empirical formula and the molecular formula. Be sure to explain your answer.

Question 5

5.

A compound contains 53.4% carbon and 11.11% hydrogen, with the rest being oxygen. What is the empirical formula for the compound?