State Dalton$'$s law of partial pressures.

(N/A) Dalton$'$s law of partial pressures states that for a mixture of non-reacting gases,the total pressure exerted by the mixture is equal to the sum of the partial pressures of the individual gases.
Mathematically,it is expressed as: $P_{total} = p_1 + p_2 + p_3 + \dots + p_n$ (at constant temperature and volume),
where $P_{total}$ is the total pressure of the mixture and $p_1, p_2, \dots, p_n$ are the partial pressures of the individual gases.