The number of moles of the gas present is 4 moles.
To calculate the numbers of moles of the gas present, we use the formula below.
Formula:
- PV = nRT............. Equation 1
Where:
- P = Pressure
- V = Volume
- n = Number of moles of the gas
- R = molar gas constant
- T = Temperature.
Make n the subject of the equation
- n = PV/RT............ Equation 2
From the question,
Given:
- P = 5.6 atm
- V = 12 L
- T = 205 K
- R = 0.0821 L.atm.K⁻¹.mol⁻¹
Substitute these values into equation 2
- n = (5.6×12)/(0.0821×205)
- n = 67.2/16.8305
- n = 3.99
- n ≈ 4 moles
Hence, the number of moles of the gas present is 4 moles.
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