units of amount of gas, volume of gas, pressure of gas, temperature of gas
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The volume of 1.00mol of any gas at STP (Standard temperature, 273.15 K and pressure, 1 atm) is measured to be 22.414L. We can substitute 101.325kPa for pressure, 22.414L for volume, and 273.15K for temperature into the ideal gas equation and solve for R.
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At constant temperature and volume the pressure of a gas is directly proportional to the number of moles of gas. Or you could think about the problem a bit and use PV=nRT. N2O is placed in a piston. Initially the volume of the piston is 3.0 L, and the pressure of the gas is 5.0 atm.
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