Question

A sample of neon gas at 25.0°C has a volume of 42.4 L and a pressure of 1.40 atm. How many moles of neon are there? NOTE: You must show your calculation on the attached scratch paper,

including which of the Gas Law formulas you used. *
A. 14.4 moles
B. 0.41 moles
C. 28.9 moles
D. 2.43 moles
(Show how you did it please)

Answer 1

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Using ideal gas law–

We'll use formula,

PV = nRT

Where,

P, Pressure = 1.40 atm

V, Volume = 42.4 L

n, Number of moles = ( To find ) ?

T, temperature = 25°C

• = 25 + 273

• = 298 Kelvin

R, Ideal gas constant = 0.08206 L . atm/k. Mol

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Here, PV = nRT

Or, PV / RT = n

Or,
`(1.40 \: atm *42.4 \: litres )/(298 \: k \: * 0.08206 \: l.atm /k \: .mol) = n`

Or, n = 2.43 Moles.

Or, n = 2.43 Moles.

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I had to take help from my elder brother.

We tried our best, hope it helps you.

By– Debasis ( feat – Apollo)

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