popquiz exam 1 - a BaCl 2 b Al 2 F 3 c Na 2 O d RbBr e CaO...

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Popquiz for EXAM 1 (worth up to 8pts) CHM 2045C Name_______ 1. The melting point of antimony is listed in one handbook as 1167.3 ° F. Expressed in kelvins this temperature would be a. 357.6 K b. 496.8 K c. 583.7 K d. 894.2 K e. 903.9 K 2. How many cubic inches are in 1.00 dm 3 ? 1 in. = 2.54 cm. a. 61.0 in 3 b. 155 in 3 c. 394 in 3 d. 1.64 x 10 4 in 3 e. 383 x 10 2 in 3 3. "Isooctane", a fuel used in gasoline engines because it has an antiknock octane rating of 100, has a density of 0.6919 g cm -3 . How many pounds would 20.4 gallons of this fuel (a typical full tank) weigh? 1 gallon = 3785 cm 3 = 4 quart; 1 pound = 453.6 g a. 77.2 pounds b. 246 pounds c. 118 pounds d. 24.2 pounds e. 50.6 pounds 4. How many atoms are there in one formula unit of NiSO 4 7H 2 O? a. 9 b. 14 c. 27 d. 28 e. 33 5. Which formula is incorrect because it does not represent a known ionic compound?
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Unformatted text preview: a. BaCl 2 b. Al 2 F 3 c. Na 2 O d. RbBr e. CaO 6. How many molecules of carbon dioxide are in 154.0 grams of carbon dioxide? a. 3.499 b. 2.107 × 10 24 c. 4.214 × 10 24 d. 9.274 × 10 25 e. 4.081 × 10 27 7. A compound contains arsenic and oxygen as its only elements. A 1.626 g sample of the compound contains 1.060 g of arsenic. What is the empirical formula for the compound? a. As 2 O b. AsO c. As 2 O 3 d. AsO 2 e. As 2 O 5 8. 150.0 grams of AsF 3 was reacted with 180.0 g of CCl 4 to produce AsCl 3 and CCl 2 F 2 . The theoretical yield of CCl 2 F 2 , in grams is a. 141.5 grams b. 206.2 grams c. 137.5 grams d. 104.4 grams e. 152.6 grams...
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This note was uploaded on 01/18/2011 for the course CHM 2045C taught by Professor James during the Spring '10 term at South Florida Community College.

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popquiz exam 1 - a BaCl 2 b Al 2 F 3 c Na 2 O d RbBr e CaO...

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