Assignment 6

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You have recently become interested in collecting used classic vinyl recordings. The jackets for these disks often have no liners to protect the records from dust and other sources of scratches, so you seek to purchase some liners from online vendors. Two web sites offer 12-in. inner plastic liners: site A advertises liners with a thickness of 50 microns, while the liners at site B are 3 mils thick. Which of the sites is selling the thicker liner?

||| ANAN Microsoft O V The extraction of aluminum metal from the aluminum hydroxide found in bauxite by the Hall-Héroult process is one of the most remarkable success stories of 19th century chemistry, turning aluminum from a rare and precious metal into the cheap commodity it is today. In the first step, aluminum hydroxide reacts to form alumina (Al₂O3) and water: 2Al(OH)3(s) → Al₂O3(s) + 3H₂O(g) W Microsoft CHEMICAL REACTIONS Reaction sequence stoichiometry Microsoft 6.52.210... esc In the second step, alumina (Al2O3) and carbon react to form aluminum and carbon dioxide: 2Al₂O3(s) + 3C(s) → 4Al(s) + 3 CO₂ (8) Suppose the yield of the first step is 91.% and the yield of the second step is 85.%. Calculate the mass of aluminum hydroxide required to make 6.0 kg of aluminum. Be sure your answer has a unit symbol, if needed, and is rounded to the correct number of significant digits. Explanation Check 9,269 Q x10 HH 103 X OCT 24 ロ・ロ S OOO tv NONZA © 2022 McGraw Hill LLC. All Rights…

Application 14. Given the function f(x) = 3x3 - 48x find the following: (Round to 1 decimal place) a) The x and y intercepts [K/U: ] b) The local maximums and minimums [A:. c) Find any points of inflections [A: I d) Graph the function [C 5

3. You found a weird ceramic material on the street and wonders if it might be ok to use in a medical device. What technique can you use to figure out the chemical composition of the surface? What can you use to see what the surface looks like?

The refining of aluminum from Bauxite ore (which contains 50.% Al2O3 by mass) proceeds by the overall reaction 2AL2O3 + 3C -> 4Al + 3CO2. How much bauxite ore is required to give 5*1013g of Aluminum produced each year in the United States? (Assume 100% Conversion)  a 1.3*1013gb 5.3*1013gc 1.9*1013gd 7.6*1013g

The extraction of aluminum metal from the aluminum hydroxide found in bauxite by the Hall-Héroult process is one of the most remarkable success stories of 19th century chemistry, turning aluminum from a rare and precious metal into the cheap commodity it is today. In the first step, aluminum hydroxide reacts to form alumina Al2O3  and water:   2AlOH3s + Al2O3s -> 3H2Og In the second step, alumina Al2O3  and carbon react to form aluminum and carbon dioxide:   2Al2O3s + 3Cs + 4Als -> 3CO2g Suppose the yield of the first step is 83.%  and the yield of the second step is  78.% . Calculate the mass of aluminum hydroxide required to make  7.0kg  of aluminum.   Be sure your answer has a unit symbol, if needed, and is rounded to the correct number of significant digits.

Benzene (C6H6) IS burned with 76% excess air. Calculate the air-fuel ratio (AFR) to three signitcant figures.

[References] Cryolite (Na3AIF6) is used in the commercial production of aluminum from ore. Cryolite itself is produced by the following reaction: 6 N2OH + Al203 + 12 HF → 2 Na3AlF6 + 9 H2O A mixture containing 440.0 kg of NaOH, 236.9 kg of Al203, and 600.0 kg of HF is heated to 950 °C until it reacts to completion. What is the maximum mass of Na3AIF6 formed? kg Na3AIF6

Include a CLAIM: answer the question. Is this correct or not? Include EVIDENCE: Describe what you see in the calculation work that supports your claim. Include REASONING: Explain WHY you selected that evidence to support your claim.   Hint attached.

an empty evaporating dish weighs 25.1295 g. When unknown mixture is added, the dish and mixture weigh 29.9745 g. After removing the Fe with a magnet, the dish and remaining mixture weigh 28.2374 g. After extraction of the NaCl and drying the remaining solid, the dish and final mixture weigh 26. 8928 g. Calculate the mass and mass percent of Fe, NaCl, and SiO2 in the sample. Show all your work.

Ammonia (NH3) is naturally produced through the decomposition of organic material as wellas being high in wastewater discharged to natural waters. In the environment it is oxidizedto form nitrite (NO2-), and nitrite is then oxidized to form nitrate (NO3-) in a process callednitrification. The balanced equations are given below:2NH3 + 3O2 → 2NO2- + 2H+ + 2H202NO2- + O2 → 2NO3-a) Assuming complete oxidation, what is the theoretical oxygen demand to convert100mg/L of ammonia to nitrate (i.e., how much oxygen is necessary)? Report youranswer as mg/L of O2.Answer: 376 mg/L O2b) This conversion process makes water more acidic. With reference to the equations forpH, explain why this occurs

Tab Caps M Inbox (1,600)-fantil@udeledu X Mail- Francesca A Tantillo-Out X x ← C app.101edu.co < DA 。。 A 88°F ME Mostly sunny Fn Z 2 W S X 3 Alt E Silane, SiH, is a colorless, pyrophoric, toxic gas that is used to deposit elemental silicon for semiconductor and photovoltaic applications. D SiH. has 8 total valence electrons. Draw the Lewis structure for SiH, that minimizes the formal charges on all atoms. $ 4 EXP DOP #12: Geometry-CHM150xAktw Chemistry C R F Pll S % 5 T Question 18.d of 23 V G Click to draw a new structure 6 Y + B * H & 7 PrtScn 8 N Home UL U M ( 9 K K End na O POUP $11 0 L P Alt A PgDn A D 90% B 0 Update Submit 6:19 PM D X 7 Del Backss (

Consider the microbial conversion of glucose to L-glutamic acid, as shown below. Assume that initially the bioreactor contains 200 kg of glucose, 15 kg of ammonia and 54 kg of O2. C6H1206 + NH3 +1.5 O2 →C5H9NO4+ CO2 + 3H2O glucose ammonia glutamic acid a) Which reactant is limiting? b) What is the percentage excess of the other reactants? c) If the reaction proceeds to completion, how much of the excess reactants will be left; how much L-glutamic acid will be formed; and what is the extent of reaction ? d) If the reaction proceeds to a point where the conversion of the limiting reactant is 33%, how much of each reactant and product is present at the end, and what is the extent of reaction E ? e) If the reaction proceeds to a point where 35 kg of O2 is left, what is the fractional conversion of glucose? What is the fractional conversion of O2? What is the extent of reaction E ?

could you please help me with this, this is off of my review packet for my final.AND MY FINAL IS AT 6:30 PM today!!!!!!!!!!! please help me before then

Chlorination of methane is shown as: Ch4 + Cl2 = CH3Cl + HClIf the feed contains 40% CH4, 50% Cl2 and 10%N2 and 67% of the limiting reactant is converted... What is the composition of methane (in moles) in the product? 11 12 13 14 Composition of chlorine (in moles) in the product? 22 23 24 25

* What amount (in mol) and what mass (in kg) of carbon dioxide are produced when 20 gallons (approximately 2.0 x 10' kg) of octane (C3H18) is combusted? C3H18(1) +O2(g) CO2(g) + H;O(1) A: 1.4 x 10°; 62

७.ग. 4.74 x 100 = 22.217. 4. Bleach products are sold as 5.25-7.5% hypochlorite concentration depending on whether they are "regular" or "extra-strength"? How do your mass percentages compare to these values? One of my valves falls into that range but the other two fall a little short. 5. Bleach products slowly decompose over time eventually rendering them useless. What steps can be taken to slow this (think back to the chapter on Kinetics) when storing your bleach product? The bleach products could be stored at a certain temperature and kept away from the light. This will help slow the decomposition. 6. As mentioned in the introduction, one type of bleach alternative uses hydrogen peroxide to remove stains. The H₂O2 in the product can be titrated with the MnO4 under acidic conditions by the reaction: 5 H₂O2(aq) + 2 MnO4 (aq) + 6 H* (aq) 5 02(g) + 2 Mn+2 (aq) + 8 H₂O(). If a 0.505g sample of a product containing H₂O₂ required 16.55mL of a 0.01158M MnO4 solution to reach the end point,…

The extraction of aluminum metal from the aluminum hydroxide found in bauxite by the Hall-Héroult process is one of the most remarkable success stories of 19th century chemistry, turning aluminum from a rare and precious metal into the cheap commodity it is today. In the first step, aluminum hydroxide reacts to form alumina (Al,0,) and water: 2Al(OH), (s) Al,0; (s) + 3 H,0 (g) - In the second step, alumina (Al,0,) and carbon react to form aluminum and carbon dioxide: 2Al,0; (s) + 3C(s) → 4Al(s) + 3 CO, (g) Suppose the yield of the first step is 82.% and the yield of the second step is 69.%. Calculate the mass of aluminum hydroxide required to make 10.0 kg of aluminum. Be sure your answer has a unit symbol, if needed, and is rounded to the correct number of significant digits. x10

A certain copper ore contains 2.32% of Cu2S by mass, and the remainder of the ore contains no copper. In a particular year, a single open-air smelt furnace heated 37000 tons of this ore. Compute the maximum mass of copper metal that could have been obtained by this process. (Clarification: The tons in this problem are English tons, with 1 ton = 2000 lb. You can answer in g, kg, or lb, but the computer does not understand tons as a unit for the answer.)

1. The great, great grandparents of one of your classmates sold their factory to thegovernment 104 years ago for $150,000. If these proceeds had been invested at 6%,how much would this legacy be worth today? Assume annual compounding. 2. A friend who owns a perpetuity that promises to pay $1,000 at the end of each year,forever, comes to you and offers to sell you all of the payments to be received after the25th year for a price of $1,000. At an interest rate of 10%, should you pay the $1,000today to receive payment numbers 26 and onwards? What does this suggest to youabout the value of perpetual payments? 3. Your aunt, in her will, left you the sum of $5,000 a year forever with payments startingimmediately. However, the news is better. She has specified that the amount shouldgrow at 5% per year to maintain purchasing power. Given an interest rate of 12%, whatis the PV of the inheritance?

4. True or False (1) Chlorine demand is the difference between total chlorine and free chlorine (2) In raw wastewater samples, most of nitrogen is in the form of nitrate. (3) If 10 mg/L of NH3-N is converted to nitrate, the nitrate concentration is 10 mg/L as N. (4) Free chlorine consists of hypochlorous acid and hypochlorite. (5) Chloramines is a weaker disinfectant than free chlorine. (6) Na2HPO4 contributes to the orthophosphates. (7) For phosphorus analysis, the purpose of the autoclave is to kill the phosphorus bacteria which interferes colorimetric analysis. (8) Chloride is an effective disinfectant for water and wastewater treatment. (9) "Crown" corrosion is caused by the corrosive action of H₂SO4. (10) Breakpoint chlorination can be used for removal of ammonia.

The chart shows average CO2 emissions for fossil fuel vehicles (gasoline, diesel, and hybrid gas‑electric), as well as electric vehicles. The ordinate is mg CO2 per mile driven per pound mass of the vehicle (called curb weight). For electric vehicles, CO2 emission varies in U.S. states because of the mix of fuels used to generate electricity. If electricity came entirely from solar power, there would be little CO2 associated with its production. California has the lowest CO2 emission for producing electricity and Ohio has the highest because it depends heavily on coal‑fired power plants. The chart does not include CO2 emission from manufacturing vehicles. When normalized for distance driven by each kind of vehicle before it is scrapped, CO2 emission associated with manufacturing electric vehicles is estimated to be 25–75% greater than CO2 emission associated with manufacturing gasoline and diesel vehicles. If manufacturing were included, CO2 emission associated with electric vehicles…