An experiment on the growth rate of certain organisms requires an environment of humid air enriched in oxygen. Three input streams are fed into an evaporation chamber to produce an output stream with the following composition. (A) Liquid water, fed at a rate of 20.0 cm³/min (B) Air (21% mole % 02, the balance N2) (C) Pure oxygen, with a molar flow rate one-fifth of the molar flow rate of stream B The output gas is analyzed and is found to contain 1.5 mole % water. Calculate the molar flowrate of all unknown stream variables.
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- Wet sugar that contains one-fifth water by mass is conveyed through an evaporator in which 85.0%of the entering water is vaporized. Taking a basis of 100 kg feed, calculate (i) , the mass fraction ofwater in the wet sugar leaving the evaporator, and (ii) the ratio (kg H2O vaporized/kg wet sugarleaving the evaporator).What is the Molecular weight of a certain volatile liquid which is placed in 225 g flask which has total capacity volume of 252.17 mL. After the liquid was heated to 96.7 oC the gass volatilized and the weight of the flask measure 227.33g. What is the could be the MW of the volatile sample?Electrolytic manganese dioxide can be prepared from manganese carbonate ore by crushing,milling and leaching the ore in sulphuric acid. Manganese sulphate is crystallised from thesolution, redissolved and electrolysed to give the manganese dioxide.If the crystallisation were performed in a 30m3 tank and the concentration of the solutionentering the tank were 160 grams per litre and left the tank at 40 grams per litre, how muchMnSO4.5H2O would be produced.
- A mixture of methane and air is capable of being ignited only if the mole percent of methane is between 5% and 15%. A mixture containing 9.0 mole% methane in air flowing at a rate of 7:00 x 102 kg/h is to be diluted with pure air to reduce the methane concentration to the lower flammability limit. Calculate the required flow rate of air in mol/h and the percent by mass of oxygen in the product gas. (Note: Air may be taken to consist of 21 mole% O2 and 79% N2 and to have an average molecular weight of 29.0.)stack gas analysis: 83.08% N2, 7.5% CO2, 2.3% CO, 1.12% H2, 6% O2 with a saturation temperature of 54°C at 400°C and 760mmHg. a) %excess of air (1000 m^3 of air is supplied, produced 3100 m^3 of stack gas) b) chemical formula of the fuel burned c) analysis of the fuel mixturea cylinder was connected to an open ended U-tube (1 atm) containing some mercury, Hg (density=13.6gcm^-3), and the Hg was displaced 100mm towards the container. What is the pressure of the gas inside the container?
- Ethyl alcohol (C2H5OH) may be prepared by the fermentation of glucose (C6H12O6) as indicated by the equation: yeastC6H12O6 ----> C2H5OH + CO2 74.12 mL of ethyl alcohol (specific gravity = 0.790) was collected by this fermentation pro- cess. What mass of glucose was used?A mixture of ethanol (ethyl alcohol) and water contains 40.0% water by mass.(a) Assuming volume additivity of the components, estimate the specific gravity of themixture at 20°C. What volume (in liters) of this mixture is required to provide 150 mol ofethanol?(b) Repeat Part (a) with the additional information that the specific gravity of the mixture at20°C is 0.89045 (making it unnecessary to assume volume additivity). What percentage errorresults from the volume-additivity assumption?The oxidation of ethylene to produce ethylene oxide proceeds according to the equation2C 2H 4 +O 2 ! 2C 2H 4OThe feed to a reactor contains 100 kmol C 2H 4 and 100 kmol O 2. If the reaction proceeds to completion, how much of the excess reactant will be left; how much C 2H 4O will be formed; and what is the extent of reaction?
- A fuel contains 78wt% carbon and 22wt% hydrogen (H). Combustion results in the following composition by volume (dry basis): CO2 : 9.41 CO : 1.69 O2 : 3.8 N2: 85.1 The following equations describe the chemical reactions taking place: CO+0.5 O2→ CO2 C+O2→ CO2 H2 + 0.5 O2 → H2O C+0.5O2→ CO On the basis of 120 lb moles of dry flue gas, the O2 required (lb moles) for complete combustion is most nearly. Find the amount of O2 needed for the completion of combustionIn 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…The principal reaction in a series of complex reactions performed by microorganisms involved in wine making is the conversion of sugars into alcohol in a process known as fermentation. The starting concentration of sugars determines the final alcohol content and the sweetness of the wine. Adjusting the specific gravity of the stock solution achieves the desired quality of the wine. Assuming the sugars in the stock solution with a specific gravity of 1.075 are all C12H22011 equivalent to 12.75% wt., calculate the following:a) How much is the amount of sugar per kg of water?b) How many lbs of solution is present in a cubic feet of solution?c) What is the weight of sugar in grams for every liter of solution?