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Last modified: January 26, 2018
Stochiometry
------------
Stochiometry refers to the relative quantities of reactants and
products in chemical reactions. In a balanced chemical reaction,
the relations among quantities of reactants and products typically
form a ratio of positive integers. For example, in a reaction that
forms ammonia (NH3), exactly one molecule of nitrogen (N2)
reacts with three molecules of hydrogen (H2) to produce two molecules of NH3:
N2 + 3H2 -> 2NH3
Ex: If 10 grams of methane is burned, how many grams of CO2 will be produced?
CH4 + 2O2 --> CO2 + 2H2O
LHS: 10 grams/16.0426 gram/mole => 0.6233 Mols of CH4 and 2 * 0.6233 = 1.2467 Mols of O2
RHS: 0.6233 + 1.2467 = 1.8700 Mols in the ratio of 1:2 => 0.6233