Mole Concept
Review on Mole Concept Vocabulary Terms
Question 1
What is the best definition of a mole in chemistry?
The mass of one atom
A counting unit equal to 6.022 x 10^23 particles
The number of grams in a compound
The volume of a gas at STP
Question 2
Avogadro's Number is best described as:
The number of protons in an atom
The mass of one mole of any substance
The number of particles in one mole
The number of atoms in 1 gram of hydrogen
Question 3
What is the numerical value of Avogadro's number?
3E24
1E3
6E23
9.81E2
Question 4
Molar mass is defined as:
The mass (kg) of one atom
The mass (g) of one mole of a substance
The number of particles in a compound
The density (g/mL) of a substance
The mass (L) of one mole of a compound
Question 5
What is the correct units for molar mass?
grams (g)
grams per milliliter (g/mL)
grams per mole (g/mol)
moles per gram (mol/g)
Question 6
Where can you find the information needed to calculate molar weight of a substance?
Chemical equation
Periodic Table
Balanced equation
Safety Data Sheets (SDS)
On a Digital Balance or Scale that records in grams
Question 7
Which of the following can be counted using the mole?
only atoms
only molecules
only particle units
All of the other choices are correct
Question 8
Why is the mole useful in chemistry?
It measures how fast reactions happen
It allows chemists to count tiny particles using mass
It determines chemical reactivity
It replaces the need for chemical equations
Question 9
At standard temperature and pressure (STP), one mole of any gas occupies:
1.0 L
6.022 L
22.4 L
100.0 L
Question 10
Which statement is TRUE?
One mole of oxygen atoms has more particles than one mole of hydrogen atoms.
One mole of any substance has the same number of particles.
Heavier substances have more particles per mole than lighter ones.
Molar mass depends on gases at STP
Question 11
In order to convert between moles and mass you need:
Avogadro's Number
Volume at STP for gases
Mass Number
Molar Mass
Question 12
What does STP stand for and what state of matter does it apply to when converting?
Standard Testing Protocol for solids
Scientific Temperature point for liquids
Standard Temperature and Pressure for gases
Systematic Thermal Pressure for gases
Question 13
What is needed when converting from moles to formula units?
Avogadro's Number
Molar Mass
Mass Number
Volume for gases at STP
Question 14
What is needed when converting from moles to volume?
Molar Mass
Volume of gases at STP
Mass Number
Avogadro's Number
Question 15
What is needed when converting between mass and particles?
Moles
Molar Mass and Avogadro's Number
Avogadro's Number and Volume of gas at STP
Molar Mass