Question

125 ml of nitrogen gas is collected at 70.0 degrees Celsius. The pressure

in the container is 125 kPa. What will be the volume of the gas at STP?
Round and record your answer exactly like the given volume of 125 ml (3
digits) with a space then the unit.



PLS HELP!! due at the end of the day :(

Answer 1

Answer: Volume of the gas at STP is 22.53 L.

Step-by-step explanation:

Given : Volume = 125 mL (as 1 mL = 0.001 L) = 0.125 L

Temperature =
`70^(o)C = (70 + 273) K = 343 K`

Pressure =
`125 kPa = 125 kPa * (0.01 atm)/(1 kPa) = 1.25 atm`

According to the ideal gas equation, the volume of given nitrogen gas is calculated as follows.

PV = nRT

where,

P = pressure

V = volume

n = number of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

`1.25 atm * V = 1 mol * 0.0821 L atm/mol K * 343 K\\V = (1 mol * 0.0821 L atm/mol K * 343 K)/(1.25 atm)\\= (28.1603)/(1.25) L\\= 22.53 L`

Hence, volume of the gas at STP is 22.53 L.