Chapter 22: Problem 18
Draw a structural formula for each of the following compounds. a. 2,2 -dimethylheptane c. 3,3 -dimethylheptane b. 2,3 -dimethylheptane d. 2,4 -dimethylheptane
Chapter 22: Problem 18
Draw a structural formula for each of the following compounds. a. 2,2 -dimethylheptane c. 3,3 -dimethylheptane b. 2,3 -dimethylheptane d. 2,4 -dimethylheptane
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Get started for freeWhat is wrong with the following names? Give the correct name for each compound. a. 2 -ethylpropane b. 5 -iodo \(-5,6\) -dimethylhexane c. cis-4-methyl-3-pentene d. 2 -bromo- 3 -butanol
Which base will hydrogen-bond with uracil within an RNA molecule? Draw the structure of this base pair.
The average molar mass of one base pair of nucleotides in DNA is approximately \(600 \mathrm{~g} / \mathrm{mol}\). The spacing between successive base pairs is about \(0.34 \mathrm{~nm}\), and a complete turn in the helical structure of DNA occurs about every \(3.4 \mathrm{~nm}\). If a DNA molecule has a molar mass of \(4.5 \times 10^{9} \mathrm{~g} / \mathrm{mol}\), approximately how many complete turns exist in the DNA \(\alpha\) -helix structure?
Draw the structures of the tripeptides gly-ala-ser and ser-alagly. How many other tripeptides are possible using these three amino acids?
A chemical "breathalyzer" test works because ethanol in the breath is oxidized by the dichromate ion (orange) to form acetic acid and chromium(III) ion (green). The balanced reaction is \(3 \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}(a q)+2 \mathrm{Cr}_{2} \mathrm{O}_{7}{ }^{2-}(a q)+2 \mathrm{H}^{+}(a q) \longrightarrow\) \(3 \mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}(a q)+4 \mathrm{Cr}^{3+}(a q)+11 \mathrm{H}_{2} \mathrm{O}(l)\) You analyze a breathalyzer test in which \(4.2 \mathrm{mg} \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) was reduced. Assuming the volume of the breath was \(0.500 \mathrm{~L}\) at \(30 .{ }^{\circ} \mathrm{C}\) and \(750 . \mathrm{mm} \mathrm{Hg}\), what was the mole percent alcohol of the breath?
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