Example 16 To avoid the possibility of explosion in a vessel containing gas having the composition of 40% N2, 45% O2, and 15% CH, the recommendation is to dilute the gas mixture by adding an equal amount of pure N2. What is the final mole fraction of each gas? Solution

can you help with A and B    My high school teacher said this is a good practice problem

1,1,2 - trichloroethane - acetone solution containing 42% acetone by weight at a flow rate of 1200 kg/h will be extracted in a countercurrent multistage extraction system with water at a flow rate of 2100 kg/h at 25°C. The water is not pure and contains 2% by weight of 1.1.2-trichloroethane Since acetone in the raffinate phase is not to exceed 5% by weight; a. The amount and composition of the extract and raffinate phase, b. The percent recovery of acetone, c. Calculate the theoretical number of steps required. Extract Phase Refinate Phase 1,1,2- trichloroethane 1,1,2- acetone water acetone water trichloroethane 0.0596 0.0052 0.9352 0.0875 0.9093 0.0032 0.1704 0.0073 0.8223 0.2514 0.7376 0.0110 0.2692 0.0102 0.7206 0.3852 0.5921 0.0227 0.3088 0.0117 0.6795 0.4297 0.5392 0.0311 0.0426 0.0605 0.0890 0.3573 0.0160 0.6267 0.4821 0.4753 0.4090 0.0210 0.5700 0.5395 0.4000 0.4605 0.0375 0.5020 0.5740 0.3370 0.5178 0.0652 0.4170 0.6034 0.2626

3. Determine the concentrations (in mole fraction) of all species in the exhaust from the complete combustion of propane (C3H8). Assume 50% excess air (79 mol% N2, 21 mol% O2) is the source for the охуgen.