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How many moles of a gas sample are in a 20.0 L container at 373 K and 203 kPa? The gas constant is 8.31 L-kPa/mol-K. 0.33 moles 3.05 moles 1.30 moles 0.65 moles

User Alora
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7.8k points

2 Answers

4 votes
we need to use the ideal gas formula--> PV= nRT
P, pressure= 203 kPa
V, volume= 20.0 Liters
n, moles= ?
R, constant= 8.31 L-kPa/mol-K
T, temperature= 373 K

now, lets plug these values into the formula

(203)(20.0)= (n)(8.31)(373)

n= 1.31 moles
User Lincolnadym
by
8.1k points
3 votes

Answer: The number of moles of the gas is 1.31 mol.

Step-by-step explanation:

To calculate the number of moles of gas, we use the equation given by ideal gas, which is:


PV=nRT

where,

P = pressure of the gas = 203 kPa

V = volume of the gas = 20 L

n = Number of moles of gas = ? mol

R = Gas constant =
8.31\text{L kPa }mol^(-1)K^(-1)

T = temperature of the gas = 373 K

Putting values in above equation, we get:


203kPa* 20L=n* 8.31\text{L kPa }* 373K\\\\n=1.31mol

Hence, the number of moles of the gas is 1.31 mol.

User DoctorBroctor
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8.3k points
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