500.0 mL of a gas was collected at 20.0 C and 720.0 mmHg. What is it’s volume at STP

The volume at STP is 0,441 L (441ml)

Explanation:

We use the gas formula, which results from the combination of the Boyle, Charles and Gay-Lussac laws. According to which at a constant mass, temperature, pressure and volume vary, keeping constant PV / T. The conditions STP are 1 atm of pressure and 273K of temperature. We convert the unit Celsius into Kelvin, the volume in ml into L and the pressure in mmHg into atm:

0 ° C = 273K, 20 ° C = 273 + 20 = 293K ; 500/1000= 0,500 L

760mmHg---1 atm

720mmHgx= (720mmHgx 1 atm)/760mmHg= 0,947 atm

P1xV1/T1= P2xV2/T2

V2=((P1xV1/T1)xT2)/P2

V2=((0,947atmx0,500L/293K)x273K)/1 atm

V2= 0,441 L

answer: the figure is attached herewith.

step-by-step explanation:   we are given to sketch a unit circle and label the terminal points corresponding to

in the attached figure, we have drawn a unit circle, with centre at o(0,0) and radius 1 unit. we have labelled the points a, b, c, d and e corresponding to the angles below

∠aox = 60°,

∠box = 120°,

∠cox = 180°,

∠dox = 240°,

∠eox = 300°.

and the coordinates are a(0.5,1), b(-0.5,1), c(-1,0), d(-0.5,-1) and e(0.5,-1).

thus, the answer is complete.

3 1/4 %

explanation: