Chromatography has many applications. Research one application of chromatography and explain how it is used and what characteristic is used for the separation of the analyte

QUESTION 15:

The conversion of acetophenone, C₆H₅COCH₃, to benzoic acid, C₆H₅COOH, is accomplished by the use of which oxidizing agent?

QUESTION 16:

Choose the correct statement:

1) Whats the molar solubility of MgCl2 (Ksp=8.8*10^-9) in HCl solution with pH 1.5 (detailed step please)

2) Which solution will increase molar solubility of CuCo3(s) at 298K? (Ksp of CuCO3 is 2.3 *10^-10, Ksp of Cu(OH)2 is 2.2 *10^-20)

i) HCl

ii) NaOH

iii) Na2CO3

I know NaOH is not the answer and Na2CO3 is part of the answer but why or why not the HCl be the answer? (I think it doesnt increase since won't give any mole but not sure)

Oxygen therapy uses various devices to provide oxygen to patients having difficulty getting sufficient amounts from air through normal breathing.

Among the devices are nasal cannula, which transport oxygen through small plastic tubes from a supply tank to prongs placed in the nostrils.

Consider a specific configuration in which the supply tank (volume = 3.00 ft³) was filled to a pressure of 2100.0 psig at a temperature of -30.0°F.

The patient is in an environment where the ambient temperature is 40.0°F.

When the tank is used, the pressure begins to decrease as oxygen flows at 5.00 L/min through a tube to the cannula where it is discharged into the nostrils.

Estimate the original mass of oxygen in the tank using the compressibility-factor equation of state. (kg O2)

What is the initial pressure when the temperature is 40.0°F? (atm absolute)

How long will it take for the gauge on the tank to read 50.0 psig at an atmospheric pressure of 1 atm and the stated discharge? (.... x 10^3 min)

To 1.0 L of a 0.34 M solution of HClO2 is added 0.15 mol of NaF. Calculate the [HClO2] at equilibrium.

PLEASE show ALL work!!

A 1.08×10³-mg sample of impure potassium carbonate was titrated with 46.09 mL of 0.2770 M perchloric acid. Calculate the percentage ofpotassium carbonate in the sample.

What information about the progress of the synthesis of acetaminophen could be inferred from the TLC?

In IR spectroscopy, why do heavier atoms have IR absorptions at lower frequencies?

Calculate the amount (in mL) of 0.0462M calcium hydroxide that would be required to completely react with 126.25 mL of a 0.0182M HCl solution. do not enter the unit mL in your answer.

Write a short account on the chemical and IR spectroscopic evidence for the existence of benzyne.

Despite the expense and time commitment, the total synthesis of large natural products continues to be of great use. Give two reasons why.

In each situation below, we are adding aqueous solutions of HNO3 to NH3, and the calculating the PH of solution formed. (For ammonia Kb=1.8x10^-5)

a)Write the reaction that describes what happens when HNO3 is added to NH3. Do not include spectator ions.

b)What is the pH if 52.0mL of 0.120 M HNO3 added to 50.0mL of 0.120 M NH3?

c)What is the pH if 50.0mL of 0.120 M HNO3 added to 50.0mL of 0.120 M NH3?

Could you please explain each step rather than simply giving me the answer, I am trying to understand the concepts.

You have a solution that contains 25 g of an unknown non-ionizing polymer in a 250 mL solution of chloroform (CHCl3 ). The osmotic pressure of this solution at 25 ◦C is found to be 0.056 atm. What is the molecular weight of the unknown solid?

Choose a False statement:

The weak acid HZ has a Ka of 2.55 x 10-4. Calculate the pH of a 0.235 M solution.