Quiz about Chemistry End of Course Review

Question 1

Two solutions are mixed together. A column of smoke is formed. This is an example of a ---

Accepted Answer

chemical change

Answer

physical property

Answer

chemical property

Answer

physical change

Question 2

Which is considered an intensive property?

Accepted Answer

Boiling point

Answer

Mass

Answer

Volume

Answer

Length

Question 3

Substances with an indefinite shape and definite volume are in which state of matter?

Accepted Answer

Liquid

Answer

Solid

Answer

Gas

Answer

No state of matter fits this description

Question 4

A student pours salt water into a beaker and boils it. After some time, only salt is left in the beaker. What conclusion can the student make?

Accepted Answer

The salt water is a mixture because it left salt in the beaker when boiled.

Answer

The salt water is a pure substance because its density remained constant.

Answer

The salt water is a mixture because it looked uniform before being boiled.

Answer

The salt water is a pure substance because it had a set boiling point.

Question 5

What family on the Periodic Table is most reactive nonmetals?

Accepted Answer

Group 17

Answer

Group 1

Answer

Group 12

Answer

Group 13

Question 6

Which statement most accurately describes the elements in Group 16 of the periodic table if going from top to bottom?

Accepted Answer

Atomic radii increases and ionization energy decreases.

Answer

Atomic radii decreases and ionization energy increases.

Answer

Atomic radii decreases and ionization energy decreases.

Answer

Atomic radii increases and ionization energy increases.

Question 7

An unknown element labeled as Element X is found to contain 72.15% of isotope type 1 (84.9118 amu) and 27.85% of isotope type 2 (86.9092 amu). What is the average atomic mass?

Accepted Answer

85.47 amu

Answer

85.13 amu

Answer

86.21 amu

Answer

86.49 amu

Question 8

When drawing the Lewis valence dot structure, how many "dots" would Oxygen have?

Accepted Answer

6

Answer

3

Answer

4

Answer

5

Question 9

What is the identity of the element with the following electron configuration:

1s² 2s² 2p⁶ 3s² 3p³

Accepted Answer

Phosphorous

Answer

Nitrogen

Answer

Magnesium

Answer

Chlorine

Question 10

Which of the following is a possible compound formed from Be⁺² and NO₃^-1

Accepted Answer

Be(NO₃)₂

Answer

Be2NO3

Answer

Be₃(NO₂)

Answer

BeNO

Question 11

What characteristic is responsible for high electrical conductivity of metals?

Accepted Answer

Free-floating electrons

Answer

Strong bonds between the metallic ions

Answer

Ions are displaced easily in their lattice structure

Answer

Electrostatic attractive forces between two atoms

Question 12

What is the basic idea of the VSEPR theory?

Accepted Answer

Shared and unshared electron pairs repel each other as much as possible.

Answer

There is always an octet of electrons around an atom.

Answer

Electrons are attracted to the nucleus of the atom.

Answer

Molecules repel each other due to molecular forces.

Question 13

What is the molar mass of MgSO₄?

Accepted Answer

120.37

Answer

116.13

Answer

272.83

Answer

111.21

Question 14

If a student has 11moles of NaCl, how many atoms are present?

Accepted Answer

6.62 x 10²⁴

Answer

58

Answer

642

Answer

3.51 x 10²⁵

Question 15

Which formula could represent an empirical formula?

Accepted Answer

NaHCO3

Answer

H2O2

Answer

N2H8

Answer

P3O9

Question 16

Solid zinc is mixed into a solution of copper sulfate. After the reaction, zinc sulfate and copper is produced. What type of reaction occurred?

Accepted Answer

Single Replacement

Answer

Acid-Base

Answer

Synthesis

Answer

Decomposition

Question 17

Two balloons (A & B) are inflated with gas. Balloon A is placed inside a container with liquid nitrogen. When removed from the container, balloon A is much smaller than balloon B. Why does this happen?

Accepted Answer

The gas particles in balloon A are moving slower which decreases pressure and therefore the size of the balloon.

Answer

Balloon A now has fewer gas particles which causes the balloon to decrease in size.

Answer

The gas particles in balloon A absorbed energy which caused the particles to decrease pressure and therefore the size of the balloon.

Answer

Not enough information provided.

Question 18

What is the volume of gas at 50 ^oC and 0.8atm, if there are 0.75 moles of gas present?

Accepted Answer

24.87

Answer

0.04

Answer

3.85

Answer

0.26

Question 19

Which of these does not support the Kinetic Molecular Theory of Gases?

Accepted Answer

Individual gas particles are attracted to each other.

Answer

The pressure of gas particles is partially due to the size of the gas particles.

Answer

Collisions between gas particles are perfectly elastic.

Answer

Gas particles move in constant random motion.

Question 20

Stronger acids are those that

Accepted Answer

Lose their protons more easily

Answer

Hold on to their protons more strongly

Answer

Inhibit polarity in water

Answer

Exhibit hydrogen bonding

Question 21

A solution in which more solute is dissolved that is theoretically possible is considered---

Accepted Answer

supersaturated

Answer

unsaturated

Answer

saturated

Answer

diluted

Question 22

A solution has contains both a solute and solvent. If the solute is still visible after mixing, what type of solution is this considered?

Accepted Answer

Saturated

Answer

Unsaturated

Answer

Supersaturated

Answer

Diluted

Question 23

Which of the following would decrease the rate of dissolving a solid in water?

Accepted Answer

Using a single cube of solid

Answer

Raising the temperature

Answer

Crushing the solid before mixing

Answer

Stirring the solution after mixing

Question 24

How are acids described according to Bronsted-Lowry definition

Accepted Answer

Acids are proton donors

Answer

Acids are electron donors

Answer

Acids contain hydroxide groups

Answer

Acids are completely dissociated when dissolved in water

Question 25

What does pH measure?

Accepted Answer

Hydrogen ion concentration

Answer

Electron concentration

Answer

Neutron concentration

Answer

Hydroxide ion concentration

Question 26

The pH of an acidic solution is ----

Accepted Answer

Less than 7

Answer

Exactly 7

Answer

Greater than 7

Question 27

A skillet is used to make breakfast. The pan is heated to 178 ^oC from a starting room temperature of 22 ^oC. After heating, 1.58 x 10⁵Joules of heat energy is absorbed by the skillet. If the specific heat of iron is 0.45 J/g ^oC, what must the mass of this skillet be? [Recall 1000g = 1kg]

Accepted Answer

2.25 kg

Answer

12.7 kg

Answer

110 kg

Answer

1.97 kg

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