Written by Jerry Ratzlaff. Posted in Fluid Mechanics

According to Avogadro's gas law, when temperature and pressure are held constant, the volume of a gas is proportional to the number of moles of gas present.

## FORMULA

$$\frac {V_i} {n_i} = \frac { V_f } { n_f }$$

Where:

$$V_i$$ = initial volume

$$n_i$$ = initial number of moles

$$V_f$$ = final volume

$$n_f$$ = final number of moles