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1 | |
Express the following number in scientific notation. Keep all significant digits: 278,000,000,000,000,000,000,000,000= |
| | A) | 2.78 x 1026 |
| | B) | 2.78 x 1027 |
| | C) | 2.8 x 1026 |
| | D) | 2.8 x 1027 |
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2 | |
How many inches are there in 1.00 mile? |
| | A) | 6.34 x 104 inches |
| | B) | 63360 inches |
| | C) | 6.3 x 104 inches |
| | D) | 6.3360 x 104 inches |
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3 | |
What prefix would you use to say 10-6th? |
| | A) | milli |
| | B) | deci |
| | C) | micro |
| | D) | none of the above |
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4 | |
An irregularly shaped object has a density of 15 g/mL. If the water displacement at immersion is 3.267 mL, what is the mass of the object? |
| | A) | 49 g |
| | B) | 49.0 g |
| | C) | 4.6 g |
| | D) | 4.59 g |
| | E) | .22 g |
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5 | |
Perform the following conversion: 2.7 x 106 cc -> ? quarts |
| | A) | 2.9 x 103 qt |
| | B) | 2.85 x 103 qt |
| | C) | 2.6 x 10-3 qt |
| | D) | 2.55 x 10-3 qt |
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6 | |
Perform the following conversion: 2.45 oz -> ?grams |
| | A) | 69.5 g |
| | B) | 11.6 g |
| | C) | 0.0864 g |
| | D) | 56.0 g |
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7 | |
Which of the following objects have the same density: Sphere 1: radius 4.5 in, mass 456 grams. Sphere 2: radius 1.65 in, mass 51 grams. Cube 1: 3 in, mass 200 grams. Cube 2: 3.6 in, mass 354 grams? |
| | A) | sphere 1 and cube 1 |
| | B) | sphere 2 and cube 1 |
| | C) | sphere 2 and cube 1 |
| | D) | sphere 2 and cube 2 |
| | E) | cube 1 and cube 2 |
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8 | |
A starship is cruising the interstellar space with a velocity of 2174.799173 miles per second. How far would the starship have traveled in 2 years, 9 days and 4.50 hours? Consider 365 days in one year. |
| | A) | 2.24 x 1011 km |
| | B) | 1.39 x 1011 km |
| | C) | 18,244 km |
| | D) | 29,361 km |
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9 | |
What is the molecular weight of CaCO3 to 5 significant figures? |
| | A) | 68.089g |
| | B) | 100.09g |
| | C) | 100.00g |
| | D) | 84.087g |
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10 | |
What is the molecular weight of C5H12 to 4 significant figures? |
| | A) | 13.02g |
| | B) | 72.01g |
| | C) | 72.15g |
| | D) | 72.16g |
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11 | |
What is the mass percentage of N in H2NN(CH3)2? |
| | A) | 41% |
| | B) | 23% |
| | C) | 47% |
| | D) | 88% |
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12 | |
What is the mass percentage of Cl in C2H4Cl2? |
| | A) | 38% |
| | B) | 72% |
| | C) | 71% |
| | D) | 36% |
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13 | |
How many grams of biotin (C10H16N2O3S) are in 3 moles? |
| | A) | 720.0 g |
| | B) | 732.0 g |
| | C) | 792.0 g |
| | D) | 733.0 g |
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14 | |
How many molecules are in 137g of the B vitamin Nicotinamide (C6H6N2O)? |
| | A) | 6.76 x 1023 |
| | B) | 6.81 x 1023 |
| | C) | 6.74 x 1023 |
| | D) | 6.77 x 1023 |
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15 | |
Iodine can be produced by the following reaction: 2NaI(aq) + Cl2(aq) -> I2(s) + 2NaCl(aq). How many grams of NaI are needed to produce 100g of I2? |
| | A) | 29.5 g |
| | B) | 7.61 x 106 g |
| | C) | 00526 g |
| | D) | 118 g |
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16 | |
How many mL of ethanol (C2H6O) are present in 1.39 moles? (density = .785 g/mL) |
| | A) | 81.6 mL |
| | B) | 50.3 mL |
| | C) | 42.2 mL |
| | D) | 75.2 mL |
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17 | |
How many kg of carbon dioxide are produced when 150 kg of glucose (C6H12O6) are fermented? C6H12O6 -> 2C2H5OH + 2CO2 |
| | A) | 18.3 kg |
| | B) | 73.3 kg |
| | C) | 37.9 kg |
| | D) | 36.6 kg |
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18 | |
How many grams of excess reactant will remain if sodium hydroxide reacts with phosphoric acid to give sodium phosphate and water when 18.15 g of NaOH are reacted with 14.35 g of H3PO4? |
| | A) | 2.657g |
| | B) | .5785g |
| | C) | .6383g |
| | D) | 1.375g |
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19 | |
How many grams of Li2CO3 will be produced if 32.8 g of LiOH and 32.8 g of CO2 react in the following equation: 2LiOH + CO2 -> Li2CO3 + H2O? |
| | A) | .685g |
| | B) | .202g |
| | C) | 50.6g |
| | D) | 1211g |
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20 | |
How many moles of H2O are produced when 130.7 g of glucose (C6H12O6) burns in excess oxygen? C6H12O6 + 6O2 -> 6CO2 + 6H2O |
| | A) | 4.353 moles |
| | B) | .725 moles |
| | C) | 78.35 moles |
| | D) | 31.80 moles |
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