What volume in liters does 0.750 g of N2 occupy at 19.5 oC and 748 torr?

Answer 1

Assuming the gas is ideal, we can use the Ideal Gas Law:
PV = nRT
where
P = pressure in atm
V = volume in liters
n = number of moles
R = universal gas constant = 0.0821 L-atm/mol-K
T = temperature in Kelvin

Useful units conversion:
1 atm = 760 torr
Kelvin = Celsius + 273

The molar mass of N2 = 28 g/mol. To get n, we divide the given mass (0.750 g) by the molar mass of N2 (the 28 g/mol).
Then, convert the given to their appropriate units and substitute them to the ideal gas equation to solve for the volume.

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