given the following chemical equation 4P+5O2= 2 P2O5 b) how many miles of p are needed ti react with 30.1 moles of O2

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

Which liquid (h2o, h2o + soap, or h2o + salt) has the strongest cohesion and adhesion? (need now plz)

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.