CHEM 120 Exam 2 (Latest 2023 - 2024)
Actual Questions and Answers 100% Correct
- which statement about organic compounds is false?
Answer: organic compounds are only synthesized by living systems
2. true or false: organic compounds are carbon-containing compounds
Answer: true
3. true or false: organic compounds are only synthesized by living systems
Answer: - false
4. true or false: organic compounds contain covalent bonds
Answer: true
- true or false: structural subunits called functional groups are responsible for the
chemical behavior of organic compounds
Answer: true
- CHCl3 (chloroform)
Answer: Chloroform, also known as trichloromethane, has the molecular formula
CHCl3. It is an organic compound with a central carbon atom bonded to three chlorine atoms and one hydrogen atom. The structural formula of chloroform is as
follows:
H | Cl - C - Cl | Cl
Chloroform is a colorless, volatile liquid with a sweet-smelling odor. It was 1 / 3
historically used as an anesthetic, but due to its toxicity and potential adverse health effects, its medical use has been largely discontinued. However, it still finds some applications in industry and as a solvent in certain laboratory procedures. It is essential to handle chloroform with caution and use appropriate safety measures due to its potential health hazards.
- which of the following best describes molecules related as conformational
isomers?
Answer: same molecular formulas, the same connections between atoms, but
different spacial arrangement of atoms due to rotation around bond
- the structure of an organic compound may be represented in several differ ent
ways. which formula for an organic compound explicitly shows all of the atoms and bonds in a molecule?
Answer: structural formula
- what types of carbon-carbon bonds are never found in a saturated hydro- carbon?
Answer: double and triple bonds
- which is not a characteristic associated with undecane, an 11 carbon straight
chain alkane?
Answer: hydrogren bonding
- what is the name of the compound whose condensed formula is
CH3(CH2)5CH3?
Answer: heptane
- what is the classification of the carbon atom that is bonded to the -OH group in
menthol?
Answer: secondary
- how does an alkyl differ from its parent alkane?
Answer: an alkyl group contains one less hydrogen atom than its parent alkane
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- 3-Ethyl-2-methylhexane
Answer: The structural formula of 3-ethyl-2-methylhexane is as follows:
CH3 |
CH3 - CH - CH - CH - CH2 - CH2 - CH3
| |
CH3 CH2
In this structure, 3-ethyl-2-methylhexane is an alkane with six carbon atoms in a linear chain. The "3-ethyl" prefix indicates that there is an ethyl group (CH2CH3) attached to the third carbon atom (counting from the left end of the chain). The "2- methyl" prefix indicates that there is a methyl group (CH3) attached to the second carbon atom in the chain.
The remaining carbon atoms in the chain are bonded to hydrogen atoms (not shown for simplicity). 3-ethyl-2-methylhexane is a branched hydrocarbon and is an example of an alkane with different types of alkyl groups attached to the main carbon chain.
- which name describes a three-carbon alkane
Answer: propane
- cis-1,3,dibromocyclehexane
Answer: The structural formula of cis-1,3-dibromocyclohexane is as follows:
Br Br | |
CH2 - CH - CH - CH - CH2
| Br
In this structure, cis-1,3-dibromocyclohexane is a cyclic compound with a six- membered ring (cyclohexane). The "cis" prefix indicates that the two bromine atoms (Br) are on the same side of the cyclic ring, specifically at positions 1 and 3.The remaining carbon atoms in the ring have two hydrogen atoms each (not shown
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