3.A waste water contains 67 mg/l of glucose (C6H₁2H6). Since glucose is completely biodegradable, the ThODand BOD are same. The first order biodegradation rate constant for removal of BOD is given by 0.06/hr(ka). BODt = BODu (1-e-kdt). After 5 hours during the BOD test, glucose concentration was found to be 22mg/L. If you assume that all carbon is converted to carbon dioxide, find the BOD leftover after 5 hours ofincubation.4.Determine the density of Air at 84° F and 1 atm pressure. Assume laws of ideal gases holds.

Note : As per our guidelines for a multiple question only one question can be solved for other…

Answered: Determine the density of Air at 84° F…

Engineering

Civil Engineering

Determine the density of Air at 84° F and 1 atm pressure. Assume laws of ideal gases holds.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

3. Table below shows the concentration of dissolve oxygen for a BOD test, diluted by 100. Time (days) Diluted sample DO (mg/L) 7.95 1 3.75 2 3.45 2.75 2.15 1.8 i. Determine BOD5 Given the deoxygenation rate coefficient of 0.15 day-1, determine the ultimate BOD ii. iii. Based on answer from (i), identify class of the water sample based on INWQS guideline and propose suitable usage the water.
6 Ydu will obtain 2.0 L of tap water for you water hardness test. The water hardness test uses a precipitation reaction to precipitate the Calcium bicarbonate present out of solution by adding 1.9 g of Ca(OH) represented by the following equation: Ca(HC03|21ag) + Ca(OH)215) > 2CaCOsisi + 2 H20 ml What is the percent yield of CaCO3 produced in the hard water test? (fig. 4)
3.1 In order to soften 6 MGD of water contains Ca²= 120 mg/L and Mg²+ = 95 mg/L, to the practical solubility limit using split treatment and with desired magnesium concentration of 40 mg/L as CaCO3. we need to treat only: a) 5.5 MGD b) 4.5 MGD c) 3.2 MGD d) 4.9 MGD Continue in the back 3.2 If an ion exchange water softener has 0.2 m' of ion-exchange resin with an exchange capacity of 75 kg/m³. The occupants use 2500 gallon/day of water. If the water contains 250 mg/L of hardness as CaCO, and it is desired to soften it to 90 mg/L as CaCO), what is the time between regeneration? a) 15 days b) 14 days c) 12 days d) 10 days 3.3 You are about to design a sand filter that has sand with a particle diameter of 0.02 inch. During filtration, the depth of the filter is 0.75 ft and the porosity is 0.25. During backwash, the porosity is expected to be 0.60. If gravel and underdrain layer is 1.6 ft and free board is 2 ft, the total depth of the filter will be: a) 3.5 ft b) 5.0 ft c) 8.5 ft d) 9.5 ft…
If a sample of tap water contains 400 ppm of Ca2+ and 80 ppm of Mg2+, what is the hardness of this water sample in terms of equivalent concentration CaCO3, in mg/L? a.80 ppm CaCO3 b. 400 ppm CaCO3 c. None
JQuestion a) Write down the chemical equations for the reactions that take place in the DO test. b) Discuss the environmental significance of DO. c) Why should DO fixation be performed in the field rather than in the laboratory? Data Sheet Volume of solution for titration = Samples Sample A Sample B (i) (ii) (iii) (i) (ii) (iii) Average Average Titration reading Start End (+0.05mL) (+0.05mL) mL Volume of Na2S2O3 (mL) Dissolved Oxygen (DO)(mg/L)
In determination of Acidity experiment, If the volume of 0.02N NaOH when use Methyl Orange (M.O) is 0.8 mL and 7.8 mL when use Phenolphthalein (Ph.Ph), the volume of sample is 25mL and the EW for CaCO3 is 50. The Mineral Acidity as mg (CaCO3)/L is
Chose the correct answer 1- The Unit measurement of suspended solids is ...A- kg 2- The Unit measurement of Turbidity is A- °C is B-m B-NTU C- mg/L C-K 3- The Unit measurement of pH www A-mg/L 4- The Unit measurement of alkalinity is .. 5-Non toxic metals includes 6-Dissolved materials size is lees than A- 10 mm D- none of above D- none of above D- none of above B- p.p.m C- g/m³ D- none of above A- m/sec B- m³/sec C- mg/L A-Chromium B- Mercury C- Calcium D- none of above B- 106, C-108 mm D- none of above mm 7- Public standards of Hardness in drinking water is A-500 mg/L B-50 mg/L C-100 mg/L D- none of above 8- Alkalinity species includes are A-HCO3 B-CO3 C- OH D-All of above ... 9- Dental cavities in children can prevented when Drinking water has Fluoride concentration of A- 0.1 mg/L B- 1 mg/L C- 10 mg/L D- none of above 10- Toxic metals are metals that harmful to humans even when exists in concentration of .. A- Small B-Large C-zero D- none of above
Q.1(a) What is water sweetening and softening? Discuss the lime-soda process of water softening with special reference to the different functions of lime and soda. (b) A water sample contains the following impurities per litre. Ca(HCO3)2–81 mg Mg(HCO3)2–73 mg CaSO4–68 mg MgSO4–60 mg KCl–100 mg Calculate (i) temporary and permanent hardness in water. Quantity of lime and soda required in kg for softening 50,000 litres of water if the purity of lime and soda are 80% and 90% respectively. (c) What are renewable sources of energy? Discuss their superiority over conventional sources of energy. How solar energy can be trapped thermally?
3. Some industrial spent catalyst was tested as adsorbent material in a batch experiment. The data are reproduced in the following table. Determine the Final Conc., Ce (mg/L) 14.88 9.55 1.89 0.58 0.44 0.61 0.36 Uptake, q (mg/g) 8.80 8.41 7.33 6.15 5.68 4.92 3.79 a. Determine the coefficients for these data assuming a Freundlich isotherm applies. b. Determine the coefficients for these data assuming a Langmuir isotherm applies. c. Which isotherm model provides a better fit to the data? Explain.
d) Calculate total hardness in ppm of a solution of both 55 mg/L Al2(SO4)3 and 45 mg/L Mg(NO3)2.
A sample of wet aggregate 297.2 N. After drying in an oven, this sample weighed 281.5. The absorption of this aggregates is 2.5%. Calculate the percent of free water in the original wet sample. Weight of the wet aggregates (Wwet) = 297.2 N Weight of the dry aggregates (Wdry) = 281.5 N
(a) (ii) Following chemical species were reported for water sample from a well. Concentration (milli equivalent)/L 15 15 05 30 12 18 8.8 Species Chloride (CL) Sulphate (SO2-) Carbonate (CO2) Bicarbonte (HCO3) Calcium (Ca²+) Magnesium (Mg2+) pH Find (i) The total hardness (in mg/L) as CaCO3 (ii) Alkalinity present in the water (in mg/L) as CaCO3.