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

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

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