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Chapter 2: Problem 84

Consider the following organic substances: ethylethanoate, ethylmethylether, hexanol, and propanone. (a) Which of these molecules contains three carbons? (b) Which of these molecules contain a \(\mathrm{C}=\) O group?

Short Answer

Expert verified
(a) Ethylmethylether and Propanone contain three carbons. (b) Ethylethanoate and Propanone contain a \(\mathrm{C}=\) O group.

Step by step solution

01

Identify molecular structures of the organic substances

Ethylethanoate (also called Ethyl Acetate): CH₃COOCH₂CH₃ Ethylmethylether (also called Ethyl Methyl Ether): CH₃CH₂OCH₃ Hexanol: CH₃(CH₂)₄CH₂OH Propanone (also called Acetone): CH₃COCH₃
02

Determine the molecules containing three carbons

We will count the total number of carbon atoms in each molecule. Ethylethanoate: 4 carbon atoms Ethylmethylether: 3 carbon atoms Hexanol: 6 carbon atoms Propanone: 3 carbon atoms Answer (a): Ethylmethylether and Propanone contain three carbons.
03

Identify the molecules containing \(\mathrm{C}=\) O group

We will look for the presence of \(\mathrm{C}=\) O group in each molecule. Ethylethanoate: It has a \(\mathrm{C}=\text{O}\) group in the COO fragment. Ethylmethylether: There is no \(\mathrm{C}=\) O group present. Hexanol: There is no \(\mathrm{C}=\) O group present. Propanone: It contains \(\mathrm{C}=\) O group in the COCH₃ fragment. Answer (b): Ethylethanoate and Propanone contain a \(\mathrm{C}=\) O group.

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Most popular questions from this chapter

Each of the following elements is capable of forming an ion in chemical reactions. By referring to the periodic table, predict the charge of the most stable ion of each: (a) Be, (b) \(\mathrm{Rb}\), (c) As, \((\mathbf{d})\) In, (e) At.

Provide the name or chemical formula, as appropriate, for each of the following acids: (a) hydroiodic acid, (b) chloric acid, \((\mathbf{c})\) nitrous acid, $(\mathbf{d}) \mathrm{H}_{2} \mathrm{CO}_{3},(\mathbf{e}) \mathrm{HClO}_{4},\( (f) \)\mathrm{CH}_{3} \mathrm{COOH}$.

How many of the indicated atoms are represented by each chemical formula: (a) carbon atoms in \(\mathrm{C}_{4} \mathrm{H}_{9} \mathrm{COOCH}_{3}\),(b) oxygen atoms in \(\mathrm{Ca}\left(\mathrm{ClO}_{3}\right)_{2}\), (c) hydrogen atoms in \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{HPO}_{4} ?\)

(a) What is meant by the term isomer? (b) Among the four alkanes, ethane, propane, butane, and pentane, which is capable of existing in isomeric forms?

(a) Which two of the following are isotopes of the same element: ${ }_{46}^{106} \mathrm{X},{ }_{46}^{107} \mathrm{X},{ }_{47}^{107} \mathrm{X} ?(\mathbf{b})$ What is the identity of the element whose isotopes you have selected?
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