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Chemistry 328 Level 1
Empirical Formula Homework
Answer the following problems showing all appropriate work.
1. A compound consists of 75% by mass carbon and 25% hydrogen. What is it's Empirical formula (EF)?
2. A compound consists of 75.7% arsenic and 24.3% oxygen. What the EF for this compound?
3. A compound consisting of mercury and sulfur has a total mass of 11.99g. Of the total mass, 0.88g is sulfur, what is the EF? What is the compound's chemical name?
4. A compound consists of 31.9$ potassium, 28.9% chlorine, 39.2% oxygen. What is its EF and chemical name?
5. What is the EF for a compound that has 2.1% H, 65.3% O and 32.6% S ?
Answer:
1) C1H4, 2) As2O3, 3) Hg2S1, Mercury (I) sulfide, 4) K1Cl1O3, Potassium chlorate, 5) H2S1O4