From a laboratory process designed to separate water into a hydrogen & oxygen gas, a student collected 10.0 g of hydrogen and 79.4g of oxygen. How much water was originally involved int he process??

          A  chemical reaction is spontaneous if it is accompanied by an increase in the total entropy of the system and surroundings.
          Example:
      4 Fe  + 3  O 2 → 2 Fe 2 O 3
         (s)         (g)               (s)
      Ferrous  Oxygen      Ferrous-Oxide
       (iron)                          ( rust )