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Unformatted text preview: 10 H 14 O. 8. Determine the empirical formula and the molecular formula for a compound with the following experimentally determined percent composition: 71.65% Cl 24.27% C 4.07% H 9. A white powder was analyzed and found to contain 43.64% P and 56.36% O by mass. The compound has a molar mass of 283.88 g/mol. What are the empirical and molecular formulas of the compound? 10. Calculate the mass of 500. atoms of iron. 11. How many Fe atoms are in 500.0 g of iron? 12. How many grams of compound are present in 5.00 mol of each of the following compound? a. NH 3 b. N 2 H 4 c. (NH 4 ) 2 Cr 2 O 7 13. How many grams of nitrogen are present in 5.00 mol of each of the compounds in Question 12? 14. What mass of BF 3 contains 1.5 x 10 16 F atoms? 15. What mass of calcium nitrate contains 10.0 mg of N? 16. What mass of Pb(NO 3 ) 2 is present in a 500.0 g sample of 87.5% pure Pb(NO 3 ) 2 ?...
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