Answer :

The pressure of 0.540 mol of an ideal gas at 35.5 L and 223 K is 28.2 kPa.

To calculate the pressure, we can use the ideal gas law equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Rearranging the equation to solve for pressure, we have: P = (nRT) / V.

Plugging in the given values:

n = 0.540 mol

V = 35.5 L

R = 8.314 J/(mol·K) (ideal gas constant)

T = 223 K

P = (0.540 mol * 8.314 J/(mol·K) * 223 K) / 35.5 L = 28.2 kPa (approximately)

Therefore, the pressure of the gas is approximately 28.2 kPa.

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