a gas sample occupies a volume of 140 mL at a temperature of 296 K and a pressure of 98.2kPa. how many moles of gas are there? show work.

Question

Chemistry

Augustus Orr

7 July, 08:48

a gas sample occupies a volume of 140 mL at a temperature of 296 K and a pressure of 98.2kPa. how many moles of gas are there? show work.

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Answers (1)

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Jae · Answer 1

0.00559 mol

Explanation:

The following data were obtained from the question:

V = 140mL = 0.14L

T = 296K

P = 98.2kPa = 98200Pa

Recall: 101325Pa = 1atm

98200Pa = 98200/101325 = 0.97atm

R = 0.082atm. L/Kmol

n = ?

The number of mole (n) can be obtained as follows:

PV = nRT

n = PV / RT

n = (0.97x0.14) / (0.082x296)

n = 0.00559 mol

Therefore, the number of mole of the gas present is 0.00559 mol