Chemistry 20 Course Review

Acetone, C₃H₆O, is an active ingredient in nail polish remover.  Acetone's chemical formula shows that

• acetone is made of 3 elements with 10 atoms in each molecule
• acetone is acidic because it contains the element hydrogen
• acetone is made up of both nonmetal and metal elements
• acetone is flammable or burns in air to produce carbon dioxide gas and hydrogen

The substance that would be expected to for a precipitate as a product of a chemical reaction is

• silver hydroxide
• calcium sulfide
• sodium phosphate
• lithium chloride

According to the Lewis Dot model of the atom, the number of bonding electrons in a nitrogen atom is

• 1
• 2
• 3
• 5

The molecular shapes for carbon tetrachloride and hydrogen bromide are

• linear and angular
• tetrahedral and V-shaped
• tetrahedral and linear
• pyramidal and linear

The substance that contains London forces, dipole-dipole forces and hydrogen bonding between molecules is

• hydrogen sulfide
• phosphorus trihydride
• ammonia
• methane

For a gas, which pair of variables are inversely proportional to one another if all other conditions remain constant?

• P and T
• P and V
• V and T
• n and T

Which measurement has the highest pressure?

• 3.0 mm Hg
• 3.0 atm
• 3.0 kPa
• 3.0 Pa

Which of the following is NOT an observed property of all gases?

• Gases are compressible and can liquefy under pressure
• Gases have variable shape and volume
• Gases expand to fill their containers
• Gases have a density greater than 1.00 g/mol

A solution that conducts electricity contains a(n)

• acid
• base
• salt
• electrolyte

A solution that has a relatively large quantity of solute dissolved in the solvent is

• heterogenous
• dilute
• concentrated
• dissociated