The formula for the ideal gas is PV=nRT where p is the pressure, v is the volume, n is the number of moles, R is the ideal gas constant and T is the temperature of the gas in Kelvin. In this problem, we are given n in 1.58 moles of fluorine gas, V in 25.3 L, T in 274 K, and R in .0821 L*atm/mol*K. To find P we need to divide nRT by V. It looks like this: 1.58 mol*.0821 L/*atm/mol*K*274K/25.3 L. Notice all units cancel except atm. After doing the math we get 1.40 atm. Remember the question asked for the answer to the nearest .01.
