15. Determine: a. The number of moles of hydrogen atoms in 5.32 x 1020 molecules of CH4 b. The number of total atoms in 45.2 g of calcium chloride 16. An unknown compound was found to have a percent composition as follows: 47.0% potassium, 14.5 % carbon, and 38.5 % oxygen. a. What is its empirical formula? b. If the true molar mass of the compound is 166.22 g/mol, what is its molecular formula?

15. Determine: a. The number of moles of hydrogen atoms in 5.32 x 1020 molecules of CH4 b. The number of total atoms in 45.2 g of calcium chloride 16. An unknown compound was found to have a percent composition as follows: 47.0% potassium, 14.5 % carbon, and 38.5 % oxygen. a. What is its empirical formula? b. If the true molar mass of the compound is 166.22 g/mol, what is its molecular formula?

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter9: Chemical Quantities

Section: Chapter Questions

Problem 7CR

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