Calculate the number of moles of an ideal gas if it has a pressure of 1.21 atm, a volume of 1.68 L, and a temperature of 217 oC. Use R = 0.0821 L-atm/mol-K for the value of the gas constant. a) The number of moles is 19.8 mol. b) The number of moles is 0.0505 mol. c) The number of moles is 0.114 mol. d) The number of moles is 0.00415 mol. e) The number of moles is 81.8 mol.