Unformatted text preview: iron is 4 inches on each side and thus the volume = 4 x 4 x 4. However, the density given is in g/cm 3 so we need to convert in 3 to cm 3 . The hint for the problem informs us that “1 inch is approximately 2.54 cm”. We can then equate 1 in 3 with 2.54 3 cm 3 . It is critical that we cube 2.54. 1 inch = 2.54 cm and 1 in 3 = 2.54 3 cm 3 . While this problem may look like it needs a calculator at this point, you can use the second half of the hint to further help with the calculation, “4 3 x2.5 3 is the same as (4 x 2.5) 3 ).” This allows us to simplify the multiplication of the first two terms down to (4 x 2.5) 3 . 4 x 2.5 = 10 and 10 3 = 1000 which cancels out with the 1000 in the denominator and leaves you with 8 kg as the final answer. 4 3 in 3  2.54 3 cm 3  8 g iron 1 kg = 8 kg  1 in 3  1 cm 3  1000 g...
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This document was uploaded on 11/04/2011 for the course CHEM 105 at BYU.
 Fall '07
 Macedone

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