Introductory Chemistry For Today
8th Edition
ISBN: 9781285644561
Author: Seager
Publisher: Cengage
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1.61 km = 1 mi
The speed of light is 3.0 x 108 m/s. What is the speed of light
in mph and how many orders of magnitude faster is light
traveling than a car driving 50 mph?
A. 1.12x107 mph, order of magnitude: 6
B. 1.12x10¹0 mph, order of magnitude: 9
C. 6.71 x 10¹¹ mph, order of magnitude: 10
D. 6.71 x 108 mph, order of magnitude: 7
E. 6.71x105 mph, order of magnitude: 4
1. A student wanted to find the density of an object of unknown composition with a volume of
5.50 0.05 cm³. The mass of the object was 19.255 0.005 g. What is the density of the object,
including the absolute uncertainty?
a. 3.500 ± 0.3 g cm³
b. 3.500 ± 0.03 g cm?
c. 4.259 ± 0,6 g cm¹
d. 4,259 ± 0,06 g cm³
A Solid has the volume of 22.6 cm3 and density of 8.75 g/ cm3 Calculate the mass in mg
A.) 1.98 x 10exp5 mg
B.) 1120 mg
C.) 4.32 x 10exp4 mg
D.) 1.27 x 10exp12 mg
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- b. The Moon is 3.9 x 105 km from Earth's center and 1.5 x 108 km from the Sun's center. The masses of Earth and the Sun are 6.0 x 1024 kg and 20 x 1030 kg. respectively, Find the ratio of the gravitational fields due to Earth and the Sun at the center of the Moon. c. Calculate the force of gravity that the Earth (mass 6.0x1024 kg) and the Moon (mass 7.4 x 1022 kg) exert on each other. The average Earth-Moon distance is 3.8 x108 m.arrow_forwardA piece of aluminum foil has a known surface density of 15 g/cm2. If a 100-gram hollow cube were constructed using this foil, determine the approximate side length of this cube.a. 1.05 cmb. 1.10 cmc. 2.6 cmd. 6.67 cme. 15 cmarrow_forwardHow do you solve this from start to finish? A monolayer containing 3.21 × 10 –6 g of oleic acid has an area of 20.0 cm 2. The density of oleic acid is 0.895 g / mL. What is the thickness of the monolayer (the length of an oleic acid molecule)? a. 1.79 × 10¯7 cm b. 1.44 × 10¯7 cm c. 5.75 × 10¯5 cm d. 5.58 × 10¯6 cm e. 7.17 × 10¯5 cmarrow_forward
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- 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_forward49) Calculate the length of a copper wire having a diameter of 0.200 cm and a mass of 15.620 g. The density of copper is 8.92 g/cm3. (Given: volume = 7 d2 L/4, where p = 3.14, d = diameter, and L = length) A) 1.80 x 10-4 cm B) 4.00 x 10-4 cm C) 1.75 cm %3D %3D %3D D) 5.50 × 10-2 cm E) 55.8 cmarrow_forwardConversions 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^3arrow_forward
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