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A sample of gas occupies 2.5 liters of space.How many moles of gas are there if its pressure is 1.2 atm and temperature is 25C? ___ mol (round to the nearest hundredth)​

Sagot :

Given:

P = 1.2 atm

V = 2.5 L

T = 25°C + 273.15 = 298.15 K

Required:

n

Solution:

[tex]PV = nRT[/tex]

[tex]n = \dfrac{PV}{RT}[/tex]

[tex]n = \dfrac{\text{(1.2 atm)(2.5 L)}}{(0.082057 \: \frac{\text{L • atm}}{\text{mol • K}})(\text{298.15 K})}[/tex]

[tex]\boxed{n = \text{0.12 mol}}[/tex]

Therefore, the number of moles of the gas is 0.12 mol.

[tex]\\[/tex]

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