Answer:
The structure for the compound elucidated (4-Ethylbenzoic acid) is attached below.
Explanation:
Degree of Unsaturation = (where n = no of moles)
=
= 9 - 6+1 = 4
⇒ 2 ring. 3 double bonds.
From the 1H NMR data given (peaks labeled A-E)
A. 1.2 (3H, t) ⇒ -CH3
B. 2.6 (2H, q) ⇒ -C=C-H or Aromatic-CH3
C. 7.3 (2H, d) ⇒ Aro.-H
D. 8.0 (2H, d) ⇒ Aro.-H
E. 11.0 (1H, s) ⇒ -COOH
0.06105 moles is the number of moles of water lost.
<h3>What is molar mass?</h3>Molar mass is defined as the mass in grams of one mole of a substance.
Given data:
Mass of water = 1.1g
Molar mass water = 18.016 g/mol
Moles of water =?
These quantities are related by the following equation;
Moles =
Substituting the values of the quantities and solving for moles, we have;
Moles = = 0.06105 moles.
Hence, the 0.06105 moles is the number of moles of water lost.
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The mass of pure acetic acid in 220 ml of the given solution at 20°C is 92.311 g
<h3>What is Acetic acid?</h3>Acetic acid is a type of carboxylic acid and also known as ethanoic acid
Its formula is CH₃COOH.
It is an organic compound and is a colorless liquid
It is mostly used in the production of vinegar
40 % acetic acid by mass means,
40 g of acetic acid is dissolved in 100 g of solution.
The density of solution at 20°C,
We know,
The volume of the solution, = 95.33 ml
95.33 ml of solution contains 40 g of pure Acetic acid
220 ml of solution contains = 92.311 g of pure Acetic acid
Thus, the mass of pure Acetic acid in 220 ml of solution at 20°C is 92.311 g
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