# If 4 gases in a cylinder each exert a pressure of 4 atm, what is the total pressure in the cylinder?

$16 \setminus a t m$

#### Explanation:

Partial pressure of a gas is the pressure exerted by that gas alone.

Each of $4$ gases individually exerts a pressure of $4 \setminus a t m$ i.e.

Partial pressure of each of $4$ gases $= 4 \setminus a t m$

Now, by Dalton's Law of Partial Pressures, the total pressure of gaseous mixture of non-reacting gases

$= \setminus \textrm{\sum o f \partial p r e s s u r e s}$

$= 4 + 4 + 4 + 4$

$= 16 \setminus a t m$