The volume of a sample of hydrogen gas was decreased from 11.89 l to 5.18 l at constant temperature. if the final pressure exerted by the hydrogen gas sample was 8.46 atm, what pressure did the hydrogen gas exert before its volume was decreased?

atm

200. ml of 3.00 m nacl solution is diluted to a final volume of 500. ml. what is the molarity of the final solution?

Compare and contrast physical changes with chemical changes.

For the reaction, 4 a(g) + 3 b(g) => 2 c(g), the following data were obtained at constant temperature. experiment initial[a],mol/l initial [b],mol/l initial rate, m/min 1 0.200 0.150 5.00 2 0.400 0.150 10.0 3 0.200 0.300 10.0 4 0.400 0.300 20.0 which of the following is the correct rate law for the reaction? 1. rate = k[a]2[b]2 2. rate = k[a][b] 3. rate = k[a]2[b] 4. rate = k[a][b]2