Q: Which of the following is the correct value for Avogadro's number?

$$6.02 \times 10$$^{23}$$ molecules/atoms

Question 1

Which of the following best describes the molecular geometry and bond angle of a molecule with three groups on the central atom, two bonded atoms, and one lone pair?

Accepted Answer

Bent, $$120^{\circ}$$

Question 2

A compound contains a carbon atom double-bonded to an oxygen atom and single-bonded to a hydrogen atom. Which functional group does this describe?

Accepted Answer

Aldehyde

Question 3

Which of the following ions is a polyatomic ion with a $$-2$$ charge?

Accepted Answer

Sulfate ($$\mathrm{SO_4$^{2-}})$$

Question 4

Which metric conversion is correct for converting $$1$$ kilometer to meters?

Accepted Answer

$$1\ \mathrm{km} = 1000\ \mathrm{m}$$

Question 5

A molecule has four groups on the central atom, all of which are bonded atoms and no lone pairs. What is its molecular shape and bond angle?

Accepted Answer

Tetrahedral, $$109^{\circ}$$

Question 6

Which of the following best describes a cycloalkene?

Accepted Answer

A cyclic molecule with at least one double bond between carbon atoms

Question 7

Which functional group is present in the following molecule: $$\mathrm{CH_3CH_2SH}$$?

Accepted Answer

Thiol

Question 8

A molecule contains a carbonyl group ($$\mathrm{C=O}) $$bonded to two carbon atoms. Which functional group does this represent?

Accepted Answer

Ketone

Question 9

Which of the following is the correct value for Avogadro's number?

Accepted Answer

$$6.02 	imes 10$$^{23}$$ molecules/atoms

Question 10

Which of the following best describes an aromatic compound?

Accepted Answer

A cyclic carbon molecule with double bonds every other bond

Question 11

A molecule has four groups on the central atom, two bonded atoms, and two lone pairs. What is its molecular shape and bond angle?

Accepted Answer

Bent, $$109^{\circ}$$

Question 12

Which of the following functional groups contains a nitrogen atom bonded to the molecule?

Accepted Answer

Amine

Question 13

Which of the following is the correct formula for the phosphate ion?

Accepted Answer

$$\mathrm{PO_4$^{3-}}$$

Question 14

Which functional group is present in the following molecule: $$\mathrm{CH_3COOH}$$?

Accepted Answer

Carboxylic acid

Question 15

A molecule contains a carbonyl group ($$\mathrm{C=O}) $$bonded to an oxygen atom, which is also bonded to another carbon atom. Which functional group does this describe?

Accepted Answer

Ester

Question 16

Which of the following best describes the structure of a phenol?

Accepted Answer

Aromatic ring with a hydroxyl group ($$\mathrm{OH})$$

Question 17

Which of the following is the correct metric conversion for $$1$$ liter to milliliters?

Accepted Answer

$$1\ \mathrm{L} = 1000\ \mathrm{mL}$$

Question 18

Which of the following functional groups is present in the molecule $$\mathrm{CH_3CONH_2}$$?

Accepted Answer

Amide

Question 19

A molecule contains a sulfur atom bonded to a hydrogen atom. Which functional group does this represent?

Accepted Answer

Thiol

Question 20

Which of the following best describes the difference between an alkane and an alkene?

Accepted Answer

Alkanes have only single bonds between carbon atoms, while alkenes have at least one double bond between carbon atoms.

Organic Chemistry Fundamentals: Metric Conversions, Polyatomic Ions, Molecular Geometry, and Functional Groups

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