# Which state of matter takes on the shape of a container?

$\text{Does a solid?}$ $\text{Nope}$. $\text{Does a liquid?}$ $\text{Not totally.}$
$\text{But does a gas?}$
Yes indeed they does. And $\text{Dalton's Law of Partial Pressures}$ states that in a gaseous mixture, the pressure exerted by a component gas, is the same pressure it would exert if it ALONE occupied the container. Partial pressures of component gases thus add together to give the total pressure.