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A mixture containing 18.8uM of the analyte of interest and 44.4uM of the internal standard produced chromatographic peak areas of 306 for the analyte and 511 for the standard. A second solution containing an unknown quantity of the analyte as well as 55.5 uM of the internal standard produced peak areas of 251 for the analyte and 563 for the internal standard.
Explain what is the concentration of the analyte in the second solution expressed as uM?
calculate the molar absorptivity (epslion) of Cu2+ at 620nm given that the curvettes used in lab had a pathlegth of 1.00 cm.
a voltaic cell employs the following redox reaction nbspsn2aq mns--gt sns mn2aqcalculate the cell potential at 25
1 write a net ionic equation for the precipitation reaction if any that occurs when aqueous solutions of the following
A 2.30 L sample of O2(g) was collected over a liquid at a total pressure of 785 torr and 25°C. When the O2(g) was dried (vapor of that liquid removed), the gas had a volume of 1.86 L at 25°C and 785 torr.
when you reduce benzoin with NaBH4, why do you get mostly the meso compound?
When diborane (B2H6) dissociates in either solvents, such as tetrahydrofuran (THF), a complex between borane (BH3) and the ether is formed. (a) In the Lewis sense, what is the function of BH3 as it forms the complex? Explain.
0.982 g sample of KHP (this is not potassium-hydrogen-phosphorus) is dissolved in water and titrated to the equivalence point with 26.45 mL of NaOH solution. What is the concentration (M) of the NaOH solution
draw a sheme o both reactions inlcuding structures and names of all possible products of monosubustitution only. Choose one reaction and provide appropriate mechanism including all resonance strucutres.
Explain this theary and how the shapes of simple molecules and polyatomic ions can be worked out using it. you will need to illustrate your account with a number of diagrams, in particular showing the difference typical shapes of simple molecules ..
Suppose you want to produce 1L of 3.50M aqueous solution of H2SO4. How many grams of solute are needed to make this solution.
What is the empirical formula for an prganic compound whose percentage composition is 40.0% carbon
how many moles of co2 when 15.5 ml of a 3.00 m hci reacts with excess caco3?the calcium carbonate in limestone reacts
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