1. given the natural gas gravity to air yg 0.75, the pseudocritical pressure, ppc, and temperature, tpc are 667 psi and 405 r. respectively. if the pressure and temperature are 1,500 psi and 200f, respectively, calculate how many ib of gas can fit in 1,000ft3 of space? at what pressure increase would the mass increase by 50%, ifthe temperature remains constant? 2. calculation of gas reservoir volume. use the real gas law to calculate he volume of 5 ib-mol of a gas mixture at reservoir conditions of t 180of and p 4,000 psi. assume that this natural gas has the following molar composition: 0.874 0.083 0.022 0.006 0.002 0.008 0.003 0.001 0.001 3. calculate the z-factor for a sour gas. calculate the gas deviation factor, z, of a sour gas at 190of and 4,000 psi. gas composition is given below. 0.78 0.02 0.00 0.00 0.00 000 0.00 0.00 0.00 0.02 0.15 4 8 7 0805 08 03 06 5 1 2