The composition of moist air is given on a molar basis to be 78 percent N2, 20 percent O2, and 2 percent water vapor. Determine the mass fractions of the constituents of air. Use the table containing the molar mass, gas constant, and critical-point properties. The mass fraction of N2 is 76.363 %. The mass fraction of O2 is [ 22.377 %. The mass fraction of water vapor is 1.258 %.