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Chemistry Warm-up-solutions

# Chemistry Warm-up-solutions - nanni(arn437 Chemistry...

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nanni (arn437) – Chemistry Warm-up – CNS – (87654) 2 Correct answer: 3. Explanation: See the explanation for part 1. 007 10.0points Calculate the volume of a sphere with radius of 3.0 μ m. Answer in cm 3 , to 2 significant digits. Note : Volume formulae are provided in ALEKS Your answer must be within ± 5.0% Correct answer: 1 . 1 × 10 - 10 cm 3 . Explanation: The volume of a sphere is given by V = 4 3 πr 3 . Thus, we find that the volume of the sphere is 4 3 π (3 μ m) 3 = 113 . 097 μ m 3 Now converting to cm 3 V ol cm 3 = 113 . 097 μ m 3 · parenleftbigg 1m 10 6 μ m parenrightbigg 3 · parenleftbigg 10 2 cm 1m parenrightbigg 3 = 113 . 097 μ m 3 · parenleftbigg 1m 3 10 18 μ m 3 parenrightbigg · parenleftbigg 10 6 cm 3 1m 3 parenrightbigg = 113 . 097 μ m 3 parenleftbigg 1cm 3 10 12 μ m 3 parenrightbigg = 1 . 13097 × 10 - 10 cm 3
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