Part A: Using your graduated cylinder, you calibrate the pipet you will be using and the values you collect are as follow. What is the average number of drops per mL of benzene.

  21 dropsdrops   

 23 dropsdrops   

  17 dropsdrops   

Part B: After calibration, you use the oleic acid/benzene solution to form a monolayer. It takes   6 dropsdrops   ,   9 dropsdrops    and   7 dropsdrops    before the layer on the water solution starts to make a bubble tha does not go into solution. What is the average number of drops for your monolayer?

Part C: Since we have the number of drops it takes to make a monolayer and we have the number of drops it takes to make one mL of benzene, we can determine the mL of oleic acid/benzene it takes to form a monolayer.  

Part D: Next we need to determine the mass of oleic acid in the monolayer. The concentration of the oleic acid/benzene solution is 0.02g/L. Calculate how many grams of oleic acid is in one drop.

Part E: With this information, we now need to calculate the volume in milliliters. We need to know how many mLs a drop of oleic acid occupies using the density of 0.895 g/mL and the number of drops of oleic acid solution used. (answer in mL/Drop)

Part F: Determine the volume of the monolayer from the above information.(in mL)

Part G:Calculate the thinkness of the monolayer assuming that the volume of the monolayer is   7.23×10⁻⁶ mLmL   and diameter of the watch glass is 5 cm.( answer in cm)

Part H: Determine the number of moles of oleic acid in the monolayer. Assume the nubmer of grams of oleic acid in the monolayer is   7.54×10⁻⁶ (answer in Mol)

Part I: Calculate the surface area of one molecue if we assume the molecule is shaped like a cylinder that the hight is 10x larger than the radius.( answer in cm^2)

Part J: Determine the area of the surface covered by the molecues assuming they have a circular surface which at most can cover 90.6%. ( answer in cm^2)

Part K: Calculate the number of molecules in the surface.

Part L: Calculate the number of molecues in 1 mole of calculated oleic acid.

Part M: Compare this number based on the Avogadro's number finding the % error. Discuss why the % error is well over 100% and how that would be possible.

closed

In the Bohr model, when an electron leaves one n orbit and enters another n orbit, a photon is either emitted or absorbed. Derive a relationship between the wavelength of the emitted or absorbed photon and the change in the DeBroglie wavelength of the electron when it moves from one n to another n.

Determine pH for a solution containing 0.7 M HBr and 1.4 M HC₃H₅O₂.

How would you prepare a 1.50 molal solution of sucrose in water? At what temperature would the solution begin to boil?

thank you

You are asked to prepare 1.1L of a HCN/NaCN buffer that has a pH of 9.77 and an osmotic pressure of 1.97atm at 298 K.

What masses of HCN and NaCN should you use to prepare the buffer? (Assume complete dissociation of NaCN.)

......... I put in ( 1.09 ) and ( 1.09 ) but it says its incorrect,,,,, Please Help!!

Part B

115. ft to cm

Express your answer using three significant figures.

Part C

1740. kg to lb

Express your answer using four significant figures.

Part D

835 yd to km

Express your answer using three significant figures.

What are open tubular columns and give some differences between open tubular column and packed column

Discuss differences in ordering of the aluminum in the tetrahedral site of each of the potassium feldspars and how this is reflected in the crystal system of each. What is ordering in this context?

Methanol’s toxicity is related to the way the body metabolizes it. Describe what happens and what the effects of exposure to methanol are?

Give the IUPAC name for the following compound:

Part A) Balance the following using the ½ reaction method

Permanganate ion plus bromide ion yields manganese oxide and BrO3 -      (basic solution)

Part B) Given the following data and using Hess’ Law, Calculate change in Enthalpy for the reaction

Overall reaction :     NO(g)   + O (g)   ------→ NO2(g)

                               2O3(g)    ------→ 3O2(g)                                   ∆H = - 427 kJ

                           O2(g)     ------→ 2O(g)                                  ∆H = 495 kJ

                            NO(g)   + O3 (g)   ------→ NO2 (g) + O2 (g)      ∆H = - 199 kJ

At a particular temperature the equilibrium constant for the reaction: H2(g) + F2(g) ⇔ 2HF(g) is K = 81.0. A reaction mixture in a 10.00-L flask contains 0.25 moles each of hydrogen and fluorine gases plus 0.37 moles of HF. What will be the concentration of H2 when this mixture reaches equilibrium?

It is written as 3.0 M HCl. What does the “M” mean for “3.0 M HCl”?

In the reaction, bubbles form which indicates that the reaction is going. What are those bubbles of gas made of?

What is the purpose of heating up the reaction mixture?

Why would not add too much HCl to the reaction mixture?

A) For Gorilla glass, Xensation, Sapphire glass, and Dragontrail glass, tabulate their composition, how they are made and processed, their hardness, strength, and cost.? Please, no English (Merican) units.

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Answer the question in clear words and in very good description!!! Please type your answer. Thanks