Wolfram Alpha:
Search by keyword:
Astronomy
Chemistry
Classical Mechanics
Classical Physics
Climate Change
Cosmology
Finance and Accounting
Game Theory
General Relativity
Group Theory
Lagrangian and Hamiltonian Mechanics
Macroeconomics
Mathematics
Microeconomics
Nuclear Physics
Particle Physics
Probability and Statistics
Programming and Computer Science
Quantum Computing
Quantum Field Theory
Quantum Mechanics
Semiconductor Reliability
Solid State Electronics
Special Relativity
Statistical Mechanics
String Theory
Superconductivity
Supersymmetry (SUSY) and Grand Unified Theory (GUT)
The Standard Model
Topology
Units, Constants and Useful Formulas
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