Given the balanced equation representing a reaction:
2h2 + o2 ==> 2h2o
what is the total mass of water formed when 8 grams of hydrogen reacts completely with 64 grams of oxygen?
(1) 18 g (3) 56 g
(2) 36 g (4) 72 g

We will do stoichiometry in this kind of problem:

8 g H2 x (1 mol H2 / 2.0 g H2) x (2 mol H2O / 2 mol H2) x (18 g H20 / 1 mol H2O) = 72 g H2O

64 g O2 x (1 mol O2 / 32 g O2) x (2 mol H2O / 1 mol O2) x (16 g H2O / 1 mol H2O) = 72 g H2O

Therefore, the total mass of water formed is 72 g.

Ithink that the use of creativity in the sciences entails that one produce something out of nothing or from another thing. with this, i think that the he wrote down his results as four parts of the atomic theory is the manifestation of the  creativity of john dalton.