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<br> <center>Chemistry 328 Level 1</center><br> <center>Empirical Formula Homework</center><br> <br> Answer the following problems showing all appropriate work.<br> <br> <br> 1. A compound consists of 75% by mass carbon and 25% hydrogen. What is it's Empirical formula (EF)?<br> <br> <br> <br> <Br> <br> <br> <br> <br> <br> <br> <br> <Br> <br> <br> <br> <br> <br> <br> 2. A compound consists of 75.7% arsenic and 24.3% oxygen. What the EF for this compound? <br> <br> <Br> <br> <br> <br> <br> <br> <br> <br> <br> <Br> <br> <br> <br> <br> <br> <br> <br> <br> 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?<br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <Br> <br> <br> <br> <br> <br> 4. A compound consists of 31.9$ potassium, 28.9% chlorine, 39.2% oxygen. What is its EF and chemical name? <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> 5. What is the EF for a compound that has 2.1% H, 65.3% O and 32.6% S ? <br> <br> <br> <Br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> Answer: 1) C<sub>1</sub>H<sub>4</sub>, 2) As<sub>2</sub>O<sub>3</sub>, 3) Hg<sub>2</sub>S<sub>1</sub>, Mercury (I) sulfide, 4) K<sub>1</sub>Cl<sub>1</sub>O<sub>3</sub>, Potassium chlorate, 5) H<sub>2</sub>S<sub>1</sub>O<sub>4</sub><br> <br>
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