What is the hydronium ion concentration of a solution with a poh of 6.90? 6.29 × 10−7 m 6.53 × 10−7 m 7.18 × 10−8 m 7.94 × 10−8 m

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

0.88 moles of n2o5 (g) was placed in a sealed 1.00 l vessel. calculate the equilibrium concentration of n2o5. no2, and o2 and the equilibrium constant after equilibrium has been reached by 65.0% of the n2o5 decomposing.

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.