How many neutrons does element X have if its atomic number is 22 and its mass number is 99?
1 answer:
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Answer:
13.
This is a double displacement reaction, not an acid-base reaction
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
Explanation:
All acid-base reaction have the same products, and a salt. Whit this in mind the acids would the compounds that produces the hydronium ion
and the bases would be the compounds that produces the hydroxide ion
Answer:
(C) 4-ethyl-2,2-dimethylheptane.
Explanation:
Step one: draw the carbon skeletons of each "IUPAC name" as if they were accurate. Note that
- Hexane: a carbon backbone of six carbon atoms, linked in a row with carbon-carbon single bonds.
- Heptane: a carbon backbone of seven carbon atoms, linked in a row with carbon-carbon single bonds.
- A methyl group is a one-carbon substitute -CH₃ for an H atom on the backbone.
- An ethyl group is a two-carbon substitute -CH₂-CH₃ for an H atom on the backbone.
- A propyl group is a three-carbon substitute -CH₂-CH₂-CH₃ for an H atom on the backbone.
Step two: check the structures and the names against the IUPAC rules.
There are many of these rules. Ones that apply here include:
- The backbone shall be named after the longest chain of carbon atoms. There may be right angles but the chain needs to be continuous.
- List the substitutes in alphabetical order (e.g,, ethyl, methyl, and propyl.)
- Number the substitutes from the end that ensures the smallest number for the first substitute group that is encounter. If starting from both ends lead to the same number for the first group, check the second group.
Refer to the sketch attached.
<h3>(A)</h3>Should start numbering from the other end.
<h3>(B) and (D)</h3>The longest backbone contains seven carbon atoms.
