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you need to make 1 mL of a 10 um PNP standard form a 0.2mM stock solution in pH 10 buffer.How much of the stock PNP would need to be diluted in how much of the pH 10 buffer? You have a choice of a p-20 ,p-100,p-200,p-1000,a 1mL serological pipette , and a 5mL serological pipette. Which one(s) would you choose to make this standard and why? Explain how you would calibrate the pipette(s) you choose.
How many molecules of ethanol C2H5OH are present in 135 g of ethanol? The density of ethanol is 0.789 g/cm3?
The mass spectrum of an organic compound shows the relative abundances of M to be 34.83% and M 1 to be 6.027%. Assuming the peaks are caused by 12C and 13C isotopes
A generic salt, AB, has a molar mass of 189 g/mol and a solubility of 6.10 g/L at 25 C what is the Ksp of this salt
Reaction of 3-pentanol with potassium iodide in aqueous ethanol gave no reaction under several different reaction conditions. If one adds a catalytic amount of para-toluenesulfonic acid
Nicotine is a poisonous, addictive compound found in tobacco. A sample of nicotine contains 6.16 mmol C, 8.56 mmol H, and 1.23 mmol N ( mmol = millimol = 10-3 mol).
Explain, phenomena in terms of atomic structure and behavior. When you lightly bump into a car, why does it dent and not create a hole.
A gas mixture composed of helium and argon has a density of 0.727g/L at a 755mmHg and 298K .What is the composition of the mixture by volume?
Draw the mechanism of Grignard Synthesis of Malachite Green. (Ensure that all mechanistic arrows are correctly drawn.) Show the following
The formula weight of MnSO4 monohydrate is 168.97 g/mol. MUST SHOW WORK!! A) hydrated B) solvated C) saturated D) unsaturated E) supersaturated
calculate the equilibrium partial pressures of CO2 and CO.
Draw a Lewis structure for H3C-NO2. Both oxygen atoms are directly attached to the nitrogen atom. If you take formal charge considerations into account, how many -bonds are in the molecule?
the absorbance of the solution was found to be .5528. Based on the calibration curve of Y=26.1x + .081 (where absorbance is on y axis and concentration of product C is on the x axis) determine the equilibrium concentration of C, then using an ICE ..
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