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bekas [8.4K]
3 years ago
15

Most organic acids can be represented as RCOOH, in which COOH is the carboxyl group and R is the rest of the molecule. (For exam

ple, R is CH3 in acetic acid, CH3COOH.) (a) Draw the Lewis structure of acetic acid. draw structure ... (b) Upon ionization, the carboxyl group is converted to the carboxylate group, COO−. Draw the Lewis structure for one of the two resonance structures of the acetate anion. (The acetate anion is the ionized form of acetic acid). draw structure ...

Chemistry
1 answer:
Basile [38]3 years ago
4 0

Answer:

See explaination

Explanation:

Lewis structures, which is also called electron-dot structures or electron-dot diagrams, are diagrams that show the bonding between atoms of a molecule, and the lone pairs of electrons that may exist in the molecule. A Lewis structure can be drawn for any covalently-bonded molecule, as well as coordination compounds.

Check attachment for the structures.

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The heat of fusion for a substance is 122 joules per gram. How many joules of heat are need to melt 7.50 grams of this substance
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<h3>Answer:</h3>

915 Joules

<h3>Explanation:</h3>
  • The heat of fusion is the heat that is required to convert a given mass of a substance from solid state to liquid state without change in temperature.
  • In this case, we are given specific heat of a substance as 122 joules per gram
  • It means that amount of heat equivalent to 122 joules is required to change 1 gram of the substance from solid state to liquid state.
  • Therefore, we can determine the amount of heat needed to change 7.5 grams of the substance from solid to liquid state.

1 g = 122 Joules

7.5 g = ?

       = 122 × 7.5

      = 915 Joules

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