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1 exam - Chem 141-08 Exam 1 September 17,2007 Multiple...

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Chem 141-08 Exam 1 - September 17,2007 Name:_______________________________ Multiple Choice: (3 points each) _ C __ 1. Which sample contains the most atoms? a) 50 grams of P c) 50 grams of Be b) 50 grams of Br d) 50 grams of Au _C __ 2. How many atoms of phosphorous (P) are in one molecule of Ca 3 (PO 4 ) 2 ? _ C __ 3. What is the mass of one mole of K 2 SO 4 ? _ D __ 4. The number of moles of nitrate ions in 1.50 L of 0.06 M Ce(NO 3 ) 4 is: _ A __ 5. Three liters of 1.50 M KBr contains: a) 536 g KBr b) 268 g KBr c) 4.00 moles KBr d) 1.50 mole KBr _ C __ 6. The following reaction is best classified as: 2 H 2 O (l) 2 H 2(g) + O 2(g) _ D __ 7. How many moles of NH 3 will be formed in the reaction of 22.5 g of H 2 ? N 2(g) + 3 H 2(g) 2 NH 3(g) _ C
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