1.

How much mass is in 1 gallon of gasoline? If helium in a balloon at atmospheric P and T?

Answer»

A volume of 1 gal equals 231 in3, the density is 46.8 lbm / ft3

so we get

m = pV = 46.8lbm / ft3 x 1 x (231 / 123) ft3 = 6.256 lbm

A more accurate value is p = 848 lbm / ft3.

For the helium that density is 10.08 x 10-3 lbm / ft3 

so we get

m = pV = 10.08 x 10-3 lbm / ft3 x 1 x (231 / 123) ft3 = 0.00135 lbm



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