3 chemistry assignments due in 48 hours

Molecular Formulas Practice

1. Define empirical formula.

2. Define molecular formula.

3. The empirical formula of a compound of phosphorus and oxygen was found to be P2O5. Experimentation shows that the molar mass of this compound is 283.89g/mol. What is the compound’s molecular formula?

4. A sample with a molar mass of 34.00 g/mol is found to consist of 0.44g H and 6.92g O. Find its molecular formula. (Hint: Find the empirical formula first).

5. A compound with a molar mass of 42.08 g/mol is composed of 85.4% carbon and 14.36% hydrogen. Find its molecular formula.(Hint: Find the empirical formula first).

6.