2. Water has a density of 1000 kg/m3. What is the equivalent value in the units of (a) g/cm3 (b) lbm/ft3 (c) gmol/L 3. How many of each of the following are contained in 100 g of CO2? (a) mol of CO2 (b) kmol of CO2 (c) mol C (d) molecules of CO2 4. An analysis of air sample in a process produced the following mass percentages: N2: 75.5% 02: 23.2% Ar: 1.3% What is the molar composition (i.e. mole percentages)? 5. The exhaust gas coming from a coal-burning furnace (flue gas) usually contains sulfur in the form of SO2, and when the gas is discharged into the atmosphere (which some- times happens), the SO2 can eventually react with oxygen and water to form sulfuric acid (H2SO4) and hence, acid rain. The reaction is SO2 + 1/202 + H2O + H2SO4 The air around an old power plant has the following average molar composition (i.e. mole percentages): H2SO4: 0.1 % 02: 20.2 % N2: 77.9 % H2O: 1.8 % Express the above compositions in mass percentages. a 6. The volumetric flow rate of HCl solution coming out of a manufacturing process is 10,000 L/hr and the average concentration is 0.015 M. One of the engineers weighed a liter of the solution and it weighed roughly 1.2 kg. (a) What is the density of the solution in kg/m3? (b) What is the mass flow rate of this stream in kg/hr? (c) What is the molar flow rate of HCl (in mol/min)? (d) What is the mass fraction of HCl in the solution