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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- Which 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_forward13. 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_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
- A 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_forward8. 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_forwardConvert each number to its standard form. a. 3.4 × 10 8 b. 5.822 × 10 −5 c. 3 × 10 2 d. 6.86 × 10 −8arrow_forward
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