Chemistry

A. ) A goodyear blimp typically contains 5400 m cubed of helium at an absolute pressure of 1.1*10^5 Pa. The temperature of the helium is 280 K. What is the mass (in kg) of the helium of the blimp?

B. ) Estimate the spacing between the centers of neighboring atoms in a piece of solid aluminum, based on knowledge of the density (2700 kg/m^3) and atommic mass (26.9815 u) of aluminum.

asked by joe
  1. a) use PV=nRT to find n, the number of moles of He. The Molar mass of He=4 g mol^-1. Hence the mass (g) is 4xn. then convert to kg.

    posted by Dr Russ
  2. the mass of aluminum cup

    posted by Anonymous

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