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- 5) A German fuel blend called Reichkraftskoff is made up of 50% motor benzole (75% benzene, 15% toluene, 10% xylene), 25% tetralin (C10H12), and 25% industrial alcohol (80% ethanol, 20% methanol). After combustion in excess air, a stack gas containing 9.13% CO₂ and 1.83% CO is obtained. Calculate: a) % excess air (50%) b) complete orsat analysis of the stack gas (8.09% O2, 80.95% N₂)3. A gold ore concentrate consists mostly of silica, along with some arsenopyrite (FeAsS), and pyrite (FeS2), and a very small amount of gold. It analyzes 2% arsenic and 4% sulphur, which when roasted with air will form As2O3 and SO2 vapour and hematite in the solid residue. If stoichiometric dry air is used, how many kilo-mole of oxygen will have to be blown into the roaster per hundred tonnes of concentrate?1. A gas consist of 70% propane and 30% butane by volume. Find the stoichiometric air-to-fuel ratio. a. 3:14 b. 14: 3 c. 23:1 d. 1:23 2. A furnace is fired with fuel oil with a partial analysis of 7.6% S and 2.8% N. Orsat analysis of the stack gas shows 9.44% CO2, 1.19% CO, 0.4% SO2, 0.47% H2, 6.8% O2 and 81.7% N2. Air supplied is at 23 deg Celsius, 755 mmHg and 85% RH. Calculate the percent excess air. a. 55% b. 78% c. 23% d. 38%
- Producer gas analyzing 25% CO, 13.2% H2, 0.40% CH4, 5.4% CO2, 0.80% O2 and 55% N2 isburned in excess air at 250C, 745 mmHg and 70% RH. Partial Orsat analysis of the stack gasshows 16.13% CO2, 1.79% CO and 0.72% H2. Calculate:a. Partial pressure of H2O in the stack gas if the stack gas leaves at 1 atmb. Dew point of the stack gasFind the stack gas analysis on a dry basis for 02, CO2, and N2 after stoichiometric combustion of acetylene, C2H2, in air.a) Calculate the volume in ft' of one Ib-mole of air (MW = 29 lb.m/lb-mole) at a temperature of 492 R at a pressure of 1 atm (absolute). b) Repeat the calculation of a) but now considering 1 Ib-mole of CO2 (MW= 44 lbm/lb-mole). c) Calculate the molar volume (V) of this mole of air in ft/lb-mole. d) Calculate the density (p) of air in Ibm/ft under these conditions e) Calculate the density (p) of CO, in Ibm/ft under these conditions
- In an Orsat analysis the % CO2 of the product of the combustion is 20% . If percent excess air is 30% . find the maximum percentage of CO2 attainable.17- The percentage of protein in meat products is determined by multiplying the %N as determined by the kjeldahl method by the arbitrary factor 6.25. A sample of processed meat scrap weighing 2.000 g is digested with concd H2SO4 and Hg (catalyst) until the N present has been converted to NH&HSO.. This is treated with excess NaOH, and the liberated NH3 is caught in 50.0 mL pipetful H2SO, (1.000 ml 0.01860g NazO). The excess acid requires 28.80 mL NaOH (1.000 mL = 0.1266 g KHP). Calculate % protein in the meat scrap.5. Gases: You analyze that principal components of a gas inside a valve. Through spectroscopy, you were able to analyze that components of the gas mixture are 02, N2 and H2 respectively. From that you would like to check if you have learned something from GCHEM203A by determining (a) what are the mole fractions of each component in the mixture of 15.08 g of O2, 8.17 g of N2, and 2.64 g of H2? (b) What is the partial pressure in atm of each component of this mixture if it is held in a 15.50-L vessel at 15 °C?
- ) - O + 88 www-awu.aleks.com Files Lecture 16 - The Punic... Rhetorical Analysis Essa... Journal Assignment: Pre... Document3.docx ALEKS - Anniston Stovall... b Answered: One way the... O CHEMICAL REACTIONS Anniston V Solving for a reactant in solution 1/5 One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(II) carbonate, in concentrated sulfuric acid. The sulfuric acid reacts with the copper(II) carbonate to produce a blue solution of copper(II) sulfate. Scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: Fe(s) + CUSO 4(aq) Cu(s) + FeSO4(aq) Suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. He adds powdered iron to a 100. mL copper(II) sulfate sample from the plant until no more copper will precipitate. He then washes, dries, and weighs the precipitate, and finds that it has a mass of…The researcher extracts a sample of well water and prepares it for TXRF analysis with a 10.00 mg/L V internal standard, like the calibration standards. The result produces SCa = 69297.81 and SV = 13481.2.Determine the concentration of Ca.6. A volatilization gravimetry experiment was conducted on an unknown organic liquid (presumed to only contain carbon, hydrogen, and oxygen). The liquid was massed (data in the first column below) and then combusted in an excess of oxygen. The exhaust gas was passed through a trap containing drierite and then through a trap containing ascarite. The starting and ending masses of the drierite and ascarite were used to obtain the data in the second two columns below. Mass Unknown 12.4370 12.5590 12.2230 Mass CO2 17.0822 17.2497 16.7882 Mass H₂O 13.9849 14.1221 13.7443 A.) Calculate the mass percent of carbon, hydrogen, and oxygen in the unknown liquid. There are no outliers, so you can average the data before processing, if you wish. B.) Calculate the empirical formula of the unknown compound.