Density measures A
how much liquid is in an object.
B
the amount of space an object takes up.
C
how tightly packed an object’s particles are.
D
the amount of matter contained in an object.

A IS DISPLACEMENT

B IS VOLUME

C IS DENSITY

D IS MASS

Total pressure is equal to = Summation of all partial pressure = 1.64 atm

Explanation

Since partial pressure of gas A and B is given.

So at first we calculate partial pressure of gas C using ideal gas equation.

Volume of container V = 8.7 lit

Moles of gas C is added = 0.200

Temperature = 33°C = 306 Kelvin

We know PV = nRT

where R is equal to = 0.0821 lit. atm. mole⁻¹ K⁻¹

So Pc = = = 0.577 atm

Given Partial pressure of A  = 0.314 atm

and Partial pressure of B = 0.755 atm

So total pressure = 0.577 + 0.314 + 0.755 = 1.64 atm