Why does the melting point of hydrocarbons increase as the number of carbon atoms per molecule increases?
A) An increase in the number of carbon atoms per molecules also means an increase in the density of the hydrocarbon.
B) because of greater induced dipole-induced dipole molecular attractions
C) Larger hydrocarbon chains tend to be branched.
D) The molecular mass also increases.
B
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There are many actions an individual can take to help protect endangered and threatened species. Which of the following is least likely to be effective?
A. Do not purchase products made from endangered or threatened species. B. Do not purchase animals taken from the wild. C. Do not purchase plants taken from the wild. D. Spread the word about the importance of this issue. E. When camping, use only local firewood.
What percentage of temperate forests cover Europe today?
A) 5% B) 15% C) 20% D) 75% E) 95%
The world's largest Islamic state is
A. Algeria B. Indonesia C. Iraq D. Iran
How was the radius of Earth determined? Is Earth a perfect sphere?
What will be an ideal response?