ch5q3

Calculate the lifting power (in grams) of a Helium balloon filled to 13700 meter³ at 25°C and 1.2 atm. To do this, compute the mass in excess of the Helium mass which would make the density just equal to that of ambient air at 298°K and 1.2 atm. Take the molecular mass of air to be 28.8 grams/"mole", i.e., (1/5)*32 + (4/5)*28.
The lifting power is here defined as the mass of material that the balloon can lift over and above its own mass and the mass of the Helium gas.

Choose your answer in scientific notation, e.g., ±1.000x10^±00
. x 10^{^}

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