HW 1 - C) 423.6 D) 423 E) 420 6) When 2611 + 10.7 + 0.22...

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CHEM 1406 Homework #1 qg due: Monday 1/28 or Tuesday 1/29 9 b # g 1) 5.21 cm is the same distance as A) 5.21 mm. B) 5210 m. C) 52.1 dm. D) 0.00521 km. E) 0.0521 m. 2) Which of the following is the basic unit of volume in the metric system? A) liter B) gram C) centimeter D) kilogram E) meter 3) The measurement of the gravitational pull on an object is its A) weight. B) mass. C) length. D) size. E) volume. 4) Which of the following numbers contains the designated CORRECT number of indicated significant figures? A) 0.04300 5 significant figures B) 3.0650 4 significant figures C) 1.04 2 significant figures D) 0.00302 2 significant figures E) 156,000 3 significant figures 5) A calculator answer of 423.6059 must be rounded off to three significant figures. What answer is reported? A) 423.7 B) 424
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Unformatted text preview: C) 423.6 D) 423 E) 420 6) When 2611 + 10.7 + 0.22 are added, the answer to the correct number of significant figures is A) 2620 B) 2621.92 C) 2600 D) 2621.9 E) 2622 7) Which of the following measurements are NOT equivalent? A) 150 msec = 0.150 sec B) 25 mg = 0.025 g C) 24 dL = 2.4 L D) 183 L = 0.183 kL E) 84 cm = 8.4 mm 8) A nugget of gold with a mass of 521 g is added to 50.0 mL of water. The water level rises to a volume of 77.0 mL. What is the density of the gold? A) 0.0518 g/mL B) 10.4 g/mL C) 19.3 g/mL D) 6.77 g/mL E) 1.00 g/mL 9) How many pounds are in 3.5 kg? A) 1.6 lb B) 1.59 lb C) 7.70 lb D) 7.7 lb E) 0.629 lb 10) The measurement 0.0000043 m, expressed correctly using scientific notation, is A) 4.3 x 10-5 m. B) 4.3 m. C) 4.3 x 10-6 m. D) 4.3 x 10 6 m. E) 0.43 x 10-5 m....
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