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Answer : The correct option is, (A) 0.42 moles
Explanation :
Using ideal gas equation:
where,
P = pressure of gas = 125000 Pa = 125 kPa
conversion used : (1 kPa = 1000 Pa)
V = volume of gas =
conversion used :
T = temperature of gas = 357 K
n = number of moles of gaseous mixture = ?
R = gas constant = 8.314 kPa.L/mol.K
Now put all the given values in the ideal gas equation, we get:
Therefore, the number of moles of an ideal gas is 0.42 mole.