Intro to Molar Mass

The number 6.02 x 10²³ is called...

• Obama's number

• Bohr's number

• Trump's number

• Avogadro's number

Which has more molecules?

• mole H₂O

• mole Al(OH)₃

• mole NaCl

• These all the same number of molecules

Tags

NGSS.HS-PS1-7

We use the periodic table to calculate...

• mass

• molar mass

• moles

What is the molar mass of C₂H₄O₂?

• 40g

• 50g

• 60g

• 68g

What is the molar mass of Mg₃N₂?

• 191.6 g/mol

• 76.64 g/mol

• 38.32 g/mol

• 100.95 g/mol

Which is the correct formula for:
one carbon (C)
two oxygen (O)

• CO₂

• CO

• C₂O

• 2CO

Tags

NGSS.MS-PS1-1

Which of the following statements regarding the mole is INCORRECT?

• A mole is a unit of quantity equal to 6.02 x 10²³ particles.

• The number of particles in a mole is known as Avogadro’s number.

• A mole of particles of an element is numerically equal to the atomic mass of the element.

• none of the above

Tags

NGSS.HS-PS1-7

In chemistry, a "mole" is:

• The mass of an atom

• a large number used to count particles

• based on the volume of a substance

Calculate the molar mass of Cu₃(PO₄)₂

Calculate the molar mass of PbO₂