1. The density of gold is 19.3 g/cm3 . What is the mass of a bar of gold in kilograms that measure 6 inches x 4 inches x 2 inches ?2. A bar of aluminum occupies a volume of 15 ml and weights 40.5 g . What is the density?3. Mercury metal is poured into a graduated cylinder that holds exactly 22.5 ml . The mercury used to fill the cylinder weights 306 g . From this information , calculate the density of mercury .4. What is the weight of the ethyl alcohol that exactly fills a 200 ml container ? The density of ethyl alcohol is 0.789 g/ ml .5. A rectangular block of copper metal weights 1896 g the dimensions of the block 8.4 by 5.5 by 4.6 inches. From this data, what is the density of copper?

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Answers

2014-07-31T22:24:23+08:00
You can answer this by using the formula of density
where in density is = mass/volume in ur question number two the unknown is density so u may use this formula
in #3 u can use this one too and in #4 u can use mass=density • volume
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2014-08-03T19:54:45+08:00
1. D = M/V ; (19.3 g/cm3) = M/((6 in × 2.54 cm)(3 in × 2.54 cm)(2 in × 2.54 cm)); M = 11385.73 g; 2. 40.5 g / (0.015 L × 1000 cm3) = D ; D = 2.7; 3. 306 g / (22.5 cm3) = D ; 13.6 = D; 4. 0.789 g/mL (200 mL) = M ; M = 157.8 g; 5. 1896 g / (8.4 × 2.54)(5.5 × 2.54)(4.6 × 2.54) = D; D = 0.544 g/cm3
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