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Calculate the amount in moles of a gas which oc... - JAMB Chemistry 2017 Question

Calculate the amount in moles of a gas which occupies 10.5 dm3 at 6 atm and 30oC [R = 082 atm dm3 K-1 mol-1]

A
2.536
B
1.623
C
4.736
D
0.394
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Correct Option: A

For an ideal gas PV = nRT

Amount in moles = n

Volume v = 10.5dm3

Pressure P = 6atm

Temperature T = 30°C + 273 = 303k

R, Gas constant = 0.082 atmdm3k-1 mol

Recall from ideal gas equation

pv = nRT

n = (\frac{RV}{RT})

n = (\frac{6 \times 105}{0.082 \times 303})

n= 2.536mol

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