4)(013 A quantity of 28 g of nitrogen is mixed with 32 g of oxygen at 298 K and 112 101 kPa. Which statement best describes 653 the mixture of gases formed? A More oxygen than nitrogen molecules are found in the mixture. The average velocities of nitrogen (9:380)24s) and oxygen molecules are the same C The average kinetic energies of nitrogen and oxygen molecules are the same 6059 D There is no transfer of kinetic energy when nitrogen and oxygen molecules collide. B 2.24-10 STPM 2007/P1/02 10 A manometer is a device for measuring gas pressures. A sample of nitrogen gas is placed in a close-end manometer at 25C until there is an increase of 0.100 g in its mass. The diagram below shows the height of mercury in the manometer. height of mercuri TELLO mercury 600 mm nitrogen gas 1100 mm What is the volume of the nitrogen gas in the manometer? [Relative atomic mass: N, 14.0; Molar gas constant = 8.31 J K mol-'; 760 mm Hg = 101 kPa] A 95 cm C 133 cm B 111 cm D 266 cm 2005/P1/07 = STPM