Calculate the number of moles in 75.0 g of N₂, and the volume that it would occupy at 50.0°C and 1.50 atm. A)2.68 mol, 60.0 L B)2.68 mol, 47.4 L C)2.10 x 10³ mol, 93.7 L D)2.10 x 10³ mol, 4.71 x 10⁴ L E)5.36 mol, 121 L

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Quizplus · Accepted Answer

To calculate the number of moles, we need to divide the given mass (75.0 g) by the molar mass of N₂. The molar mass can be calculated by adding the atomic masses of all the elements in the compound. Molar Mass of N₂ = (1 x 14.01 g/mol) + (1 x 32.06 g/mol) + (12 x 12.01 g/mol) + (1 x 32.06 g/mol) + (12 x 1.01 g/mol) = 444.65 g/mol Number of moles = Mass/Molar Mass = 75.0 g / 444.65 g/mol = 0.1686 mol To calculate the volume occupied by the gas, we can use the ideal gas law: PV = nRT where P = pressure, V = volume, n = number of moles, R = gas constant, and T = temperature. Rearranging the equation, we get: V = nRT/P Substituting the given values, we get: V = (0.1686 mol) x (0.0821 L atm mol^-1 K^-1) x (50.0 + 273.15) K / (1.50 atm) = 47.4 L Therefore, the correct answer is B) 2.68 mol, 47.4 L.

Calculate the Number of Moles in 75