Introductory Chemistry For Today
8th Edition
ISBN: 9781285644561
Author: Seager
Publisher: Cengage
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Conversions involving units raised to a power: include the correct number of significant digits.
a. 5.00 mm^3 to cm^3
b. 75 acres to m^2
c. 4637 nm^3 to in^3
1) The density of a material can be used to calculate the volume of an object if its mass is known. Likewise, the mass can be calculated if the density and volume are known. A pre-1964 quarter, made predominantly of silver (density= 10.5 g/mL), was determined to have a mass of 6.25 g. What is the volume of a quarter?
A. 65.6
B. 0.595 mL
C. 1.68 mL
D. 6.25 mL
2) Add: 2.11 + 104.056 + 0.1205
A. 106
B. 106.29
C. 106.286
D. 106.2865
Use scientific notation to express each quantity with only base units (no prefix multipliers).a. 4.5 ns b. 18 fs c. 128 pm d. 35 mm
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- Determine the number of significant figures in each measurement. a. 508.0 L c. 1.0200 × 1 0 5 kgb. 820,400.0 L d. 807,000 kgarrow_forwardThe number 1960900, when rounded off to 4 significant figures, would appear as _______ a. 1.961 x 10-6 b. 1961 c. 1960 d. 1.961 x 106arrow_forwardCalculate the areas and densities. Report the answers in the correct units.a. the area of a rectangle with sides measuring 3 × 1 0 1 cm and 3 × 1 0 -2 cmb. the area of a rectangle with sides measuring 1 × 1 0 3 cm and 5 × 1 0 -1 cmc. the density of a substance having a mass of 9 × 1 0 5 g and a volume of 3 × 1 0 -1 c m 3d. the density of a substance having a mass of 4 × 1 0 -3 g and a volume of 2 × 1 0 -2 c m 3arrow_forward
- 13. What is the mass (in kg) of 45.3 mL of a liquid that has a density of 0.643 g/mL? d. 0.0142 kg e. 0.0291 kg a. 29.1 kg b. 70.4 kg c. 0.0704 kg €arrow_forwardWhich number is the smallest? sic O A. 4.38 × 10-3 O B. 4.38 x 103 O C. 438 OD. 4.38 x 102 OE. 4.38 x 10-2arrow_forwardFor each number, underline the zeroes that are significant and draw an x through the zeroes that are not.a. 180,701 mi b. 0.001040 mc. 0.005710 km d. 90,201 marrow_forward
- 8. A gold ring has a mass of 15.37 g. If this ring is pure gold (density = 16.1g/mL), what would the volume of the ring be? 15.37 mL a. b. 1.04 mL 0.955 mL C. d. 16.1 mL e. 8.05 mLarrow_forwardA racetrack measures 1.0000 x 103 meters. A racecar completes a lap of this track in 20.4 seconds. To the proper number of significant figures, how should the average speed be reported? A. 49.020 meters/sec B. 49.0 meters/sec C. 49 meters/sec D. 50 meters/sec E. 49.02 meters/secarrow_forwardwrite each in standard scientific notation a. 1/1033 b. 1/105 c. 1/10-7 d. 1/0.0002 e. 1/3,093,000 f. 1/10-4 g.1/109 h. 1/0.000015arrow_forward
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