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!
The fluorescence of each of a series of acidic solutions of quinine was determined five times. The results are given below.
Concentration, ng ml-1
0
10
20
30
40
50
Fluorescence intensity
4
22
44
60
75
104
(arbitrary units)
3
46
63
81
109
21
45
79
107
5
78
101
77
105
Determine the slopes and intercepts of the un-weighted and weighted regression lines. Calculate, using both regression lines, the confidence limits for the concentrations of solutions with fluorescence intensities of 15 and 90 units. Compare the results of the un-weighted regression to those of weighted regression.
To obtain the same antifreeze protection requires 76 g of propylene glycol to replace each 62 g of ethylene glycol. Calculate the mass of propylene glycol required to replace 9.00 gal of ethylene glycol.
a 58.7g piece of iron at 67 degrees celcius is placed in a vessel containing 60.0g of water at 22 degrees celsius. the
Determine the empirical formula and the molecular formula of the organic compound. empirical and molecular formula
Draws the fischer projection of D-xylitol. Be sure to draw and show all carbon and hydrogen atoms. You do not need to draw lone pairs.
At 46°C a sample of ammonia gas exerts a pressure of 5.3 atm. Explain what is the pressure when the volume of the gas is decrease to one-fifth (0.2) of the original value at the same temperature
Describe and explain the possible effect on your results of the following experimental errors or variations. (a) You stopped the steam distillation after collecting 3 mL of distillate
Calculate the molar solubility of calcium hydroxide in a solution buffered at pH = 3, pH =7, pH = 9. Ksp value for Ca(OH)2 from the textbook: 4.68*10^-6
Suppose you have a sample which should melt at 100-101 degree C. You place 0.015 grams in a capillary tube in an oil bath at 101 degree C. If the heat of fussion for the sample is 50 cal/gram
a sample of potassium hydrogen oxalate khc2o4 weighing 0.832 g was dissolved in water and titrated with 25.80 ml of
If the cell potential is 0.061 V at 25?, what is the pH of the electrolyte at the hydrogen electrode
one mole of methane has a mass of 16.0 grams. how many grams of methane are needed to make 1.0 l of a 0.20 molar
electrons having this speed would need to be treated as waves in atoms because the wavelength is on the order of the size of atoms.
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