Chapter 9, Problem 4P

In order to calibrate a pipet, you obtain the following data:   # of drops mL Trial 1 30 0.72 Trial 2 30 0.77 Trial 3 30 0.82 What volume in mL does your pipet deliver per drop?

A fly ash aerosol of monodisperse particles with a density of 2.0 g/mL and particle diameter of 10.0 mm has a concentration of 1000.0 mg/m3. Calculate the settling velocity in cm/s and the settling rate in g/m2-s. Please answer very soon will give rating surely

Example: A GC-FID analysis was conducted on a soil sample containing pollutant X. The following separations were conducted: t (minutes) peak area Injection 1 21.1 ppm Toluene internal Standard 10.11 36,242 33.4 ppm 14.82 45,997 Injection 2 21.1 ppm Toluene Internal Standard 10.05 38,774 unknown concentration X 14.77 39,115 What is the concentration of X in the sample?

1) Comment on the Pearson’s R of the generated line equation, before you compute for the unknown concentration. 2) Compute for the Mean, SD and RSD of the finalized concentration and report proper significant figure.

I know you don't answer graded questions and I am not looking for you to straight up give me the answer to this but how do I even start? like I said before I know that the highest peak is 16amu which is Oxygen but do I just the vertical bar as a ratio? Like the next bar to the left (15amu?) is like 90% intensity? so like 9:10 ratio? There isn't even a 15amu element so please just give me some idea where to start. The place in the book it tells you to go to read has nothing about this stuff, its about finding empirical formulas from mass or percentages.... please help me!

If pH (± 0.5 pH units) strips were used to determine the equivalence point at pH=8.5. What is the relative error (%) in pH at the equivalence point? I assumed it should be 0.5/8.5 * 100 = 5.88, rounded to 5.9 for sig figs. but I got the answer wrong. Please help and let me know how to solve this.

y= mx+ b Slope () =   -4E-09        y-intercept () = 0.4021 and OD= 0.540 , Calculate the concentration (x)

kindly prepare an assignment on Application of HPLC in Drug Analysis: one page show name of the drug, dosage form, extraction step, type of column, separation parameters e.g., flow rate, mobile phase, detection wavelength and run time. Submit before 05.11.

An HPLC method was developed for the separation and determination of ibuprofen in blood samples. A 3.00 mL blood sample dissolved in 70.00 mL solvent was prepared and 10.0 mL was injected into the HPLC. Standard ibuprofen solutions were also run.Calculate the ibuprofen present in the 3.00 mL blood sample The following data were obtained. Table po itoo: Ibuprofen concentration, mg/ml0.50 1.0 2.0 3.0  Blood sample   Peak area (Right column)5.29.617.419.911.4