How many pounds of carbon dioxide (CO2) are generated annually due to household electricity use based on the information below? The household uses 9350 kWh per year and the emission factor for electricity is 70.3 kg CO2 per MMBtu. The electricity power plant is 34% efficient. *Recall: 3412 Btu 1 kWh 1 kg = 2.20462 lb 1 MMBtu = 1,000,000 !3! Btu
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- Carbon dioxide gas, CO2(g), is generated in the combustion of a sample of ethane (C2H6). This CO2 is all bubbled into aqueous barium hydroxide to be absorbed to produce 0.506 g of solid barium carbonate precipitate. How many grams of ethane (C2H6) were initially burned? The absorption-precipitation reaction is given by [CO2(g) + Ba(OH)2(aq) BaCO3(s) + H2O(l)].Cereal is being dried in a vertical drier by air flowing countercurrent to the cereal. To prevent breakage of the cereal flakes, some of the exit air from the drier is recycled back to mix with the the moist fresh air. For each 1000 kg/hr of wet cereal fed to the drier, calculate the input of moist fresh air in kg/hr and recycle rate in kg/hr. The available data on stream compositions is (fractions): For water: Fresh air: 0.0132 Wet cereal: 0.200 Exit air: 0.263 Dried Cereal: 0.050 Air entering Dryer: 0.066Various parameters in a gas absorption experiment are as follows; Water flow rate =5 L/min, Air flow rate=25 L/min, CO2 flow rate=6 L/min. Then, to find the amount of CO2 absorbed into the water 1 hour after the system is started and stabilized, 50 mL samples are taken from the inlet and outlet of the tank and titrated with 0.01M NaOH. 100mL samples are taken from the tower entrance and exit and sent to the hemp apparatus. The consumptions measured with the help of the Hemp apparatus are 2.1 mL (inlet) and 1.9 mL (output), respectively. According to this, find the amount of CO2 absorbed by titration? (Note: The relative error in the experiment is 10.)
- In a metered-dose inhaler (MDI), such as those used for asthma medication, medicine isdelivered by a compressed-gas propellant. (The device is similar in concept to a can of spraypaint.) When the inhaler is activated, a fixed amount of the medicine suspended in thepropellant is expelled from the mouthpiece and inhaled. In the past, chlorofluorocarbons(CFCs) were used as propellants; however, because of their reactivity with the Earth's ozonelayer, they have been replaced by hydrofluorocarbons (HFCs), which do not react withozone. Now HFC use is also being reduced due to their high global warming potential. In one brand of inhalers, the original CFC propellant was replaced by HFC 227ea (C3HF7,heptafluoropropane). The volume of the inhaler propellant reservoir is 1.00×102 mL, and thepropellant is charged into the reservoir to a gauge pressure of 4.443 atm at 23°C. An onlinesearch for properties of HFC 227ea yields the information that the critical temperature andpressure of the substance…1. What is the mEq of silver nitrate? 170 0.0170 0.170 17.0 2. How much (mL) silver nitrate is required for the standardization? 4.995 49.950 49.590 45.990 * MW of silver nitrate = 170 g/mol * Please take note that Im looking for the silver nitrateExplain and show work step by step: 1. A mixture of Al2O3(s) and CuO(s) weighing 18.371 mg was heated under H2(g) in a thermogravimetric experiment. On reaching a temperature of 1000 °C, the mass was l7A62 mg and the final products were Al2O3(s), Cu(s), and H20(g). Find the weight percent of Al2O3(s)in the original solid mixture.
- Downvoted for wrong solution. A river is carrying water containing 2000 mg/l Magnesium Chloride into a small lake. The lake has a naturally occurring Magnesium Chloride of 50 mg/l. If the river flow is 2500 Lmin and the lake flow rate is 1.5 m³.sec¹, what is the concentration of MgCl2 in the lake after the discharge point? Assume that the flows in the river and lake are completely mixed, that the salt is a conservative substance, and the system is at steady state.Grammer Chicken produces canned chicken a la king. The chicken a la king passes through three departments: (1) Mixing, (2) Retort (sterilization), and (3) Packing. In the Mixing Department, chicken and cream are added at the beginning of the process, the mixture is partly cooked, and chopped green peppers and mushrooms are added at the end of the process. Conversion costs are incurred evenly throughout the mixing process. November data from the Mixing Department as follows: 1 Summarize the flow of physical units and compute the equivalent units. (Hint: Each direct material added at a different point in the production process requires its own equivalent-unit computation.) i. Check your spelling carefully and do not abbreviate. ii. Follow the format of the exhibit that shows the flow of physical units and output in terms of equivalent units. iii. Complete all input areas. Be sure to include any zero balances in the report. 2 Compute the cost per equivalent unit for…TVA’s Kingston Fossil Plant near Cedarville, Tennessee, burns about 14,000 tons of coal a day. A typical rail car is 53 ft long from coupling to coupling, weighs 30 tons empty and can carry 100 tons of coal. How many minutes would you have to wait at a crossing for this train to pass, each day, if it was pulled by four locomotives, each 70 ft long and moving at 10 miles per hour through town? Such delays cause decreased ability to provide effective emergency response times and interference with commuters and local freight delivery affecting the local economy.
- if a volumetric pipet delivers 24.844g of deionized water at 31.00 degrees C, what is the calibrated volume of the pipet?If 35,000 kg of whole milk containing 4% fat is to be separated in a 6-hour period into skim milk with 0.45% fat and cream with 45% fat, what are the mass flow rates of the two output streams from a continuous centrifuge which accomplishes this separation? (Ans; Cream=464.8335kg/h, Skim milk= 5368.4998kg/h)Sugar Cane Solution Evaporation. Evaporator is used to thicken sugar cane solution. The feed rate is 10,000 kg / day, wherein the solution contains 25% (w / w) solid sugar. The result of thickening is that of a 65% (w / w) solution of solid sugar. Calculate the weight of the solution produced and the amount of air removed. (a) The weight of the solution produced = Answerkg (b) The amount of air removed = Answerkg