Relate gas volumes to moles and reaction stoichiometry at given conditions.
Because all gases occupy the same molar volume under identical conditions, gas volumes react in the same ratio as their coefficients. That is Avogadro’s law, and it lets volumes be used directly without converting to moles. Gas volume ratios equal coefficient ratios only at constant temperature and pressure, which is why both must be stated.
Gas Stoichiometry
n = pV ÷ RT, then apply the coefficient ratio; equal volumes contain equal moles
n = pV ÷ RT, then apply the coefficient ratio; equal volumes contain equal moles Because all gases occupy the same molar volume under identical conditions, gas volumes react in the same ratio as their coefficients. That is Avogadro’s law, and it lets volumes be used directly without converting to moles.
Gas volume ratios equal coefficient ratios only at constant temperature and pressure, which is why both must be stated.
This calculator takes 5 inputs: Volume of gas, Pressure, Temperature, Coefficient of this gas, Coefficient of the product. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.