What is the annual carbon dioxide emissions offset per year (t CO2/yr) for using a 8.3-kW photovoltaic system that produces 11,390 kWh annually? Assume the emission factor for standard electricity is 0.407 kg CO₂/kWh and the power plant is 33% efficient.

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An aqueous solution of aluminum iodide, All3, contains 12.6 grams of aluminum iodide and 17.5 grams of water. The percentage by mass of aluminum iodide in the solution is %.

Group I Cations of 6 M HCI; centrifuge for ~1 minute. Decant the solution and add an additional one or two drops of 6 M HCI; if no additional precipitate forms, the precipitation is complete. If it was incomplete, centrifuge to obtain the additional solid; then decant the liquid, add 1 or 2 drops of 6 M HCI, and repeat the procedure until no precipitate forms. Discard the supernatant into the appropriate waste container or keep for later experiments if your instructor so indicates. Add 1.5 mL of cold deionized or distilled water to the precipitate to wash; agitate, centrifuge, and discard the water to the appropriate waste container. Repeat the wash procedure. The solid contains Pb2*, Ag*, and/or Hg22*. Step 2. Separation of Pb2*. Add 1 mL of boiling water to the solid from step 1. Agitate, centrifuge, and decant the liquid. Repeat the extraction, combining the supernatant. The liquid should contain Pb?* if any is present. Step 3. Testing for Pb2*. Add 2 or 3 drops of 0.2 M K2CRO4…

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4.4 Discuss the process of sampling and preparation of laboratory sample in quantitative analysis.

Lewis structures of group T compounds Draw Lewis structures for each of the following molecule or ion: Methane, CH4 Ammonia, NH3 Water, H2O Borane, BH3 Sulfur dioxide, SO2 Carbon dioxide, CO2 Nitrogen, N2 Hydrogen cyanide, HCN Hydronium ion, H3O+ Iodine, I2 Ammonium, NH4+ Formaldehyde, CH2O Ozone, O3 Carbonate ion, CO32−   Include the number of valence electrons and the number of pairs of electrons for each.

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