$$M = \frac{\text{mol solute}}{\text{L solution}}$$

$$m = \frac{\text{mol solute}}{\text{kg solvent}}$$

Question 1

Which group and valence electron configuration does the element shown in the Lewis dot diagram (with 6 dots around the symbol 'S') belong to?

Accepted Answer

Group 6A, $$(2s)^2$$ $$(2p)^4$$

Question 2

Given the VSEPR model shown (AX$$_3E$$), what is the molecular geometry of the central atom?

Accepted Answer

Trigonal pyramidal

Question 3

Which Lewis structure correctly represents NCl$$_3$$?

Accepted Answer

A structure with three single bonds to Cl and a lone pair on N

Question 4

Which of the following best describes the geometry of the molecule shown with five bonds and no lone pairs on the central atom?

Accepted Answer

Trigonal bipyramidal

Question 5

Which molecular shape is represented by the model with four bonds and no lone pairs on the central atom?

Accepted Answer

Tetrahedral

Question 6

Which molecular shape is represented by the model with three bonds and two lone pairs on the central atom?

Accepted Answer

T-shaped

Question 7

Which molecular shape is represented by the model with three bonds and no lone pairs on the central atom?

Accepted Answer

Trigonal planar

Question 8

Which molecular shape is represented by the model with two bonds and no lone pairs on the central atom?

Accepted Answer

Linear

Question 9

In the Lewis structure of glycine, what is the ideal bond angle for the H-N-H angle (Angle 1)?

Accepted Answer

$$109.5^\circ$$

Question 10

In the Lewis structure of glycine, what is the ideal bond angle for the O-C-O angle (Angle 2)?

Accepted Answer

$$120^\circ$$

Question 11

In the Lewis structure of glycine, what is the ideal bond angle for the C-O-H angle (Angle 3)?

Accepted Answer

$$109.5^\circ$$

Question 12

Which of the following statements about the periodic table is correct regarding the group number and valence electrons for main-group elements?

Accepted Answer

The group number equals the number of valence electrons for main-group elements.

Question 13

Which equation correctly relates the work done by a gas during expansion or compression?

Accepted Answer

$$w = -P \Delta V$$

Question 14

Which equation defines enthalpy ($$H) in $$terms of internal energy ($$E$$), pressure ($$P$$), and volume ($$V$$)?

Accepted Answer

$$H = E + PV$$

Question 15

Which equation defines molarity ($$M$$)?

Accepted Answer

$$M = \frac{	ext{mol solute}}{	ext{L solution}}$$

Question 16

Which equation defines molality ($$m$$)?

Accepted Answer

$$m = \frac{	ext{mol solute}}{	ext{kg solvent}}$$

Question 17

Which SI unit prefix represents $$10^{-9}$$?

Accepted Answer

nano

Question 18

Which SI unit prefix represents $$10^{-12}$$?

Accepted Answer

pico

Visual Study Guide: Chemical Bonding and Molecular Geometry

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