Mole ratios are obtained from the coefficient of balanced compounds in a chemical reaction.
For every chemical reaction, there are reactants which give rise to products, when the chemical equations are balanced, the stoichiometric coefficients which come before the balanced chemical formulae of compounds give rise to mole ratios.
Thus a Mole ratio is the conversion factor that tells s the number of moles of the compounds reacting to form products.
For example
N₂ + 3H₂---->2NH₃
The above equation tells Us the mole ratio are in
1 : 3 : 2
Also,
1 mol of N₂ / 2 moles of 2NH₃
1 mol of N₂ / 3 moles of H₂
3 moles of H₂/ 2 moles of 2NH₃
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