Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Question
An ore from a mine in Sudbury was analysed for Manganese by UV-VIS molecular spectrophotometry. 0.2180 g of the ore was digested in an acid mixture and the resulting digest was diluted to the mark in a 100.0 mL volumetric flask with distilled water (Solution #1). 25.00 mL of this solution was pipetted into a 50.0 mL volumetric flask and 5.00 mL of a standard solution (Solution #2) containing 1.00 g/L of Mn was added to the flask. The flask was filled to the mark with distilled water (Solution #3). Another solution was prepared by adding 10.00 mL of the standard Mn solution (Solution #2) to another 50.0 mL volumetric flask adding distilled water to the mark (Solution #4). Both solutions (Solution #3 & #4) were analysed for Mn as the permanganate ion MnO4- at a wavelength of 525 nm. The measured absorbances of the solutions were: Solution #3 = 0.423 and solution #4 = 0.298. Calculate the following, the: i) absorptivity of the MnO4 ion - ii) percent transmittance of solution #3 iii) percent of Mn in the sample of the ore
Please show full solution of the answer
Presume the experiment is performed at room temperature 25 degrees C, what concentration of sucrose must we use in the extracting solution to make sure the lysosomes don't rupture with the knowledge that sucrose doesn't dissociate
Problem- A solution is made by dissolving 0.45 mole of NaF in enough water to give a final volume of 300.0 mL. What is the molarity of the solution
A piece of Al(s) at 94°C is placed in 65g of H2O at 28°C. The Aluminum cools and after equilibrium the final temperature of Aluminum and water is 38°C. What was the mass of the aluminum?
How many grams are present in 1 gram of potassium-40. Its natural abundance is 0.0117% and its half life is 1.28X10^9 yrs
Explain the three kinds of enzymatic inhibitors. Sketch a Line weaver-Burk plot for each, Explain how the kinetics of the reaction is changed.
Consider a solution that contains 85.0% R isomer and 15.0% S isomer. If the observed specific rotation of the mixture is -80.0°, explain what is the specific rotation of the pure R isomer
What is the maximum number of water molecules that could form H bonds (one H bond per water molecule) with 1-propanol. to glyceraldehyde
When 2 moles of Mg3N2 are allowed to react with water to form ammonia gas and magnesium oxide, how many moles of H2O are required?
Find out the required pressure to compress 180 liters of N at 1.0 atm into a tank whose volume is 34 liters.
Calculate the solubility of Ca(OH)2 in a 0.469M CaCl2 solution at 31°C, given that the Ksp of Ca(OH)2 is 4.96 x 10-6 at that temperature. Give your answer in milli Molar units
Butane(C4H10) is used as a fuel where natural gas is not avaiable. How many grams of butane will fill a 45.0 liter container at 27 degrees celsius and 3.05atm
A first order reaction has an Arrhenius constant for the reaction is 9.4 x 10^10 sec ^-1, and an activation energy of 64.4 kJ. At what temperature (in Celsius) is the rate constant equal to 0.472 sec^-1
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd