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## Homework Statement

When the volume of a gas is 2.81 L, the pressure is 740 Torr and the temperature is 20

^{o}C, how many moles of gas is there?

## Homework Equations

PV=nRT

## The Attempt at a Solution

740 Torr = 740*133.3 = 98.6*10^3 Pa

Temperature in Kelvin: 293 K

n = PV/RT = (98.6*10^3 * 2.81) / (8.3145*293) =

__114 moles__

The corret answer is 0.114 moles. Does this mean that when using the ideal gas law, the pressure should be in kPa?