How many moles of hydrogen molecules (h2) would be required to produce two moles of hydrogen peroxide (h2o2)?

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

If 90.0 grams of ethane reacted with excess chlorine, how many grams of dicarbon hexachloride would form

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?