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A sample of gas exhibits ideal behavior and occupies a volume of 350. mL at 25.0C and 1.00atm. How many moles of gas are present in the sample?

Sagot :

The number of mole of the gas present in the sample which occupies a volume of 350 mL at 25 °C and 1 atm is 0.0143 mole

From the question given above, the following data were obtained:

Volume (V) = 350 mL = 350 / 1000 = 0.35 L

Temperature (T) = 25 °C = 25 + 273 = 298 K

Pressure (P) = 1 atm

Gas constant (R) = 0.0821 atm.L/Kmol

Number of mole (n) =?

With the application of the ideal gas equation, the number of mole of the gas present in the sample can be obtained as follow:

PV = nRT

1 × 0.35 = n × 0.0821 × 298

0.35 = n × 24.4658

Divide both side by 24.4658

n = 0.35 / 24.4658

n = 0.0143 mole

Therefore, the number of mole of the gas present in the sample is 0.0143 mole

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