Organic Chemistry Answers

Reporting summary measures such as the mean, median, and standard deviation has become very common in modern life. Many companies, government agencies will report these descriptive measures of a variable, but they will rarely provide information on the shape of the distribution of that variable. In previous tutorials, you have learned some basic properties of some distributions that can help you to decide if a specific type of distribution is a good fit for a set of data. According to the National Diet and Nutrition Survey: Adults Aged 19 to 64, British men spend an average of 2.15 hours per day in moderate or high intensity physical activity. The standard deviation of these activity times for this sample was 3.59 hours. Can we infer that these activity times could follow a normal distribution? The following may provide an answer.

a. Sketch a normal curve marking the points representing 1, 2, and 3 standard deviations above and below the mean, and calculate the values at these points using a mean of 2.15 hours and standard deviation of 3.59 hours.

b. Examine the curve with your calculations. Explain why it is impossible for this distribution to be normal based on your graph and calculations.

c. Considering the variable being measured, is it more likely that the distribution is skewed to the left or that it is skewed to the right? Explain why.

d. Suppose that the standard deviation for this sample was 0.70 hours instead of 3.59 hours, which make it numerically possible for the distribution to be normal. Again, considering the variable being measured, explain why the normal distribution is still not a logical choice for this distribution.

e. In your opinion, is there any difference between the term statistics and statistic?

condensed and Bond line structure for the following compound 1) 3-Ethyl -4,4-dimethyl heptane

Draw a structural diagram of the molecule below:

3-methyl-6-cyclobutylnon-4-yne

. Explain the possible reactions of various isomers of C4H8O2 with lithium aluminum hydride and phosphorus trichloride

Two alkenes, A and B, each have the formula C5H10. Both react with H2/Pt and with

HBr to give identical products. What are the structures of A and B?

Explain the following statements:

(i) Inversion of configuration for product from SN2 reaction.

(ii) Tertiary alkyl halide undergoes SN1 reaction but primary alkyl halide favorites SN2

reaction

Convert 15.33 grams of KCl to moles of KCI. Molar mass of KCl is 74.55 g/mol

Convert 29.14 grams of KCl to moles of KCI. Molar mass of KCl is 74.55g / mol 

Convert 44.33 grams of KCl to moles of LiF. Molar mass of LiF is 25.94 g / mol 

Convert 0.6047 moles of PCl5 to g of PCl5. Molar mass of PCl5 is 208.24 g / mol

Convert 0.8173 moles of BH3 to g of BH3. Molar mass of BH3 is 13.84 g / mol

Convert 0.8912 moles of BH3 to g of BH3. Molar mass of BH3 is 13.84 g / mol

Explain the reduction of nitrobenzene using different reagents.

Give the chemical formula for sodium nitride and calculate its molar mass

b) Give a short explanation for each of the following observations: (i) Alcohols with three or fewer carbon atoms are soluble in water. Those with four carbon atoms are sparingly soluble and those with five of more carbon atoms are insoluble in water. (ii) Propanol (Mw = 60) has a higher boiling point than butane (Mw = 58). (iii) The decreasing order of acidity of alcohol is 1° > 2° > 3° (iv) 2-Chloroethanol is more acidic than ethanol.