A bar of gold measures 0.15m x 0.050m x 0.050m. How many gallons of water have t

Question

A bar of gold measures 0.15m x 0.050m x 0.050m. How many gallons of water have the same mass as this bar? 1gallon is 3.785x10^-3 m^3. Density of gold is 19300kg/m^3, and density of water is 1000kg/m^3. A. 2.8gal B. 5.2gal C. 1.9gal D. 2.1gal A bar of gold measures 0.15m x 0.050m x 0.050m. How many gallons of water have the same mass as this bar? 1gallon is 3.785x10^-3 m^3. Density of gold is 19300kg/m^3, and density of water is 1000kg/m^3. A. 2.8gal B. 5.2gal C. 1.9gal D. 2.1gal A. 2.8gal B. 5.2gal C. 1.9gal D. 2.1gal

Explanation / Answer

mass = density * volume =

so mass of gold bar = (0.15 x 0.050 x 0.050) *19300 =7.237 Kg

Now for water

7.237 = volume * 1000

volume = 7.237*10-3 m3

3.785x10^-3 m^3.= 1gallon then 7.237*10-3 m3 = 1.91 gallon

ans is (C)

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