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Unformatted text preview: b. If you have 3.30 g of carbon dioxide, how many moles of carbon dioxide do you have? i. How many grams are there in 0.5 mol of iron(II) chloride? c. How many formula units of potassium chloride are there in 3.0 g of KCl? 5. Mass percentage a. What is the mass percent of each element in propane, C 3 H 8 ? What mass of carbon is there in 300 g of propane? 6. Empirical formula a. Camphor smells nice. It is composed of 78.09% carbon and 10.59% hydrogen and oxygen. What is the empirical formula of camphor? b. If camphors molar mass is 153 g/mol, what is the molecular formula of camphor? 7. Molarity a. What is the molarity of a 500 mL solution that contains 40.0 g of sodium chloride? b. What is the molarity of a 30% (m/v) aqueous solution of methanol (CH 3 OH)? c. What was the starting concentration of a stock solution if 20.0 mL are diluted to 155.0 mL of 3.0 M solution?...
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