Hydrogen and oxygen react under a specificset of conditions to produce water accordingto the equation2 H2(g) + O2(g) −→ 2 H2O(g).How much hydrogen would be required toproduce 3.9 mol of water?Answer in units of mol.

Which statement is true according to the kinetic theory? a. molecules of different gases with the same mass and temperature always have the same average density. b. molecules of different gases with the same mass and temperature always have the same average volume. c. molecules of different gases with the same mass and temperature always have the same pressure. d. molecules of different gases with the same mass and temperature always have the same molecular mass. e. molecules of different gases with the same mass and temperature always have the same average kinetic energy.