1. A Review of General Chemistry

Given a 3D representation of butane, which bond-line (skeletal) structure correctly represents the molecule?

Which of the following best represents the correct skeletal structure for the linear form of $D$-glyceraldehyde?

Given the following Lewis structure for butane: ${\mathrm{CH}}_3$-${\mathrm{CH}}_2$-${\mathrm{CH}}_2$-${\mathrm{CH}}_3$, which of the following best represents its skeletal structure?

How many implied hydrogens does each labeled carbon have?

How many implied hydrogens does each labeled carbon have?

Convert the structure into a line-angle structure. Be sure to assignALL necessary formal and net charges.

Convert the structure into a line-angle structure. Be sure to assignALLnecessary formal and net charges.

Convert the structure into a line-angle structure. Be sure to assignALLnecessary formal and net charges.

Convert the structure into a line-angle structure. Be sure to assignALLnecessary formal and net charges.

In 1934, Edward A. Doisy of Washington University extracted 3000 lb of hog ovaries to isolate a few milligrams of pure estradiol, a potent female hormone. Doisy burned 5.00 mg of this precious sample in oxygen and found that 14.54 mg of CO₂ and 3.97 mg of H₂O were generated.

b. The molecular weight of estradiol was later determined to be 272. Determine the molecular formula of estradiol.

Compound X, isolated from lanolin (sheep's wool fat), has the pungent aroma of dirty sweatsocks. A careful analysis showed that compound X contains 62.0% carbon and 10.4% hydrogen. No nitrogen or halogen was found.

b. A molecular weight determination showed that compound X has a molecular weight of approximately 117. Find the molecular formula of compound X.

Give the molecular formula of each compound shown

(a)

(b)

(c)

Some of the following molecular formulas correspond to stable compounds. When possible, draw a stable structure for each formula. Propose a general rule for the numbers of hydrogen atoms in stable hydrocarbons.

Convert the following hybrid structural formulas into the line-angle drawings.

(b)