Question

Determine the number of moles in a container of gas at STP with a volume of 99.2L

Answer 1

Answer:

4.43 mol

Explanation:

PV = nRT => n = PV/RT = (1 atm)(99.2L)/(0.08206 L Atm/mol K)(273K)= 4.43 mol

Answer 2

The number of moles of the gas in the container at STP is 4.43 moles

From the question,

We are to determine the number of moles of gas in a container at STP.

Using the ideal gas equation

PV =nRT

Where P is the pressure

V is the volume

n is the number of moles

R is the ideal gas constant (R = 0.08206 L atm mol⁻¹ K⁻¹)

and T is the temperature

From the given information

V = 99.2 L

and

At STP

P = 1 atm

T = 273 K

Putting the parameters into the formula, we get

$1 \times 99.2 = n \times 0.08206 \times 273$

∴ $n = \frac{1\times 99.2}{0.08206 \times 273}$

$n = \frac{99.2}{22.40238}$

n = 4.4281 moles

∴ n = 4.43 moles

Hence, the number of moles of the gas in the container at STP is 4.43 moles

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