14. The masses listed on the periodic table represent the weighted average of all existing isotopes for that element. This means that the more abundant an isotope is, the more it contributes
to the weighted atomic mass listed on the periodic table. Chlorine has two isotopes, one with a mass
of 35, which is 76% abundant, and the other has a mass of 37 and is 24% abundant. Show your
work to justify the weighted atomic mass of Chlorine that is listed on the periodic table.
I

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

Ammonia and oxygen react to form nitrogen monoxide and water, like this: 4nh3 (g) + 5o2 (g) → 4no (g) + 6h2o (g) also, a chemist finds that at a certain temperature the equilibrium mixture of ammonia, oxygen, nitrogen monoxide, and water has the following composition: compound pressure at equilibrium nh3 65.1atm o2 31.3atm no 62.7atm h2o 65.8atm compound pressure at equilibrium nh3 65.3 atm o2 7.79 atm no 12.1 atm h2o 65.8 atm calculate the value of the equilibrium constant kp for this reaction. round your answer to 2 significant

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both