Hydrogen fuel cells combine hydrogen and oxygen to produce water and energy. assume 1 kg of fuel is used, and the mass of the water produced is 1.10 x 10-11 kg. how much energy is produced by this fuel cell?

The pressure inside a hydrogen-filled container was 2.10 atm at 21 ? c. what would the pressure be if the container was heated to 92 ? c ?

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

What happens to isotopes that are unstable?