7) What is the IUPAC name of this compound? OH CH3 -C- CH3 CH3 A) butanol B) propanol C) 2-propanol D) 2-methylbutanol E) 2-methyl-2-propanol Answer:

2- 185.0 mL of .12 M C2H5NH2 with 285.0 mL of 0.21 M C2H5NH3CI Kb(C2H5NH2) = 5.6×10^-4 Express your answer using two decimal places. pH = ?

Correct numbers 1 and 3. Show all work/calculations:

2-28 The solubility product of calcium fluoride (CaF2) is 3 x 10-11 at 25°C. Could a fluoride concentration of 1.0 mg L-¹ be obtained in water that contains 200 mg L-¹ of calcium? Show your work.

After determining the absorbance of several standards of known concentration, the trendline for a calibration curve (AKA a standard curve) plotting absorbance (y-axis) against concentration (M, x-axis) is determined to be y = 4.943x + -0.0001 The absorbance of a solution of unknown concentration is determined to be 0.48. Calculate the concentration of the unknown solution in M. Give your answer to three decimal places.

In the copper experiment, a copper wire dissolves in nitric acid, a gas evolves. What is the color, name and chemical formula of the gas? For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).

For problems 1-4 you are not expected to come up with an exact structure. Use the provided data to identify functional groups the molecule contains and propose some possible structures that fit the data

Answer number 1,2,3,4 and 10 only.

To determine the molar concentration of a metal ion in a solution of unknown concentration, a student fırst made five standard solutions that contain the metal ion of interest and measured the absorbance of each solution in a spectrophotometer at its Amax- A calibration curve was obtained that had an equation of y = 5.747 x + 0.013 Next, the student pipetted 15.0 mL of the initial solution of unknown concentration into a 100.0 mL volumetric flask, and filled the flask with deionized water to the line. The absorbance of this final diluted solution was found to be A = 0.226 at Amax. The color of the original and diluted solution was blue. What is the molarity of the original solution, as well as an approximate Amax for this metal ion? 2max = 599 nm and concentration is 0.247 M Amax 457 nm and concentration is 0.247 M %3D 2 max = 457 nm and concentration is 0.0371 M 1 max 599 nm and concentration is 0.0371 M Amax = 599 nm and concentration is 0.00557 M