chem hw - Nick Buttler Chapter 2 34. How many hydrogen...

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Nick Buttler Chapter 2 34. How many hydrogen atoms are contained in 135 grams of propane? 135 g propane * 1 mol propane ____ * 6.02 *10^23 propane molecules * __4 H atoms __ 18.0385 g propane 1 mol propane 1 prop. Molec. = 3.2508 * 10^26 H atoms = 1.80 * 10^25 atoms H 18.0385 g propane 1 N = 14.0067 amu 4 H = +4.03176 amu 18.0385 amu 35. a. How many formula units are contained in 149.3 g of K 2 CrO 4 ? 149.3 g K 2 CrO 4 * 1 mol K 2 CrO 4______ * 6.02 * 10^23 formula units K 2 CrO 4 1194.19 g K 2 CrO 4 1 mol K 2 CrO 4 = 8.99 * 10^23 formula units K 2 CrO 4 = 7.528 * 10^23 formula units 1194.19 2 K = 78.1966 1 Cr = 51.996 4 O = 63.9976 194.1902 amu b. How many potassium ions? 7.528 * 10^23 formula units * 2 K ions _____ = 1.506 * 10^24 K ions 1 formula unit c. How many CrO 4 2- ions? 7.528 * 10^23 formula units * 4 CrO 4 2- ions __ = 3.011 * 10^24 CrO 4 2- ions 1 formula unit d. How many atoms of all kinds? 1.506 * 10^24 + 3.011 * 10^24 =
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chem hw - Nick Buttler Chapter 2 34. How many hydrogen...

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