Molar Mass

The molar mass of an element is equal to its...

• Atomic mass
• Atomic number
• Oxidation number
• Valence electrons

What is the molar mass of fluorine gas?
(beware!)

• 18.998 g/mol
• 38 g/mol
• 9 g/mol
• 18 g/mol

What is the molar mass of table salt (NaCl)?

• 116.886 g/mol
• 35.453 g/mol
• 22.990 g/mol
• 58.443 g/mol

What is the mass of one mole of aluminum?

• 27 g
• 13 g
• 54 g
• 14 g

How many particles are in a mole?

• 602
• 602 million
• 602 moles
• 6.02 x 10²³

Calculate the molar mass of Ba(C₂H₃O₂)₂

• 255.3 g/mol

• 237.3 g/mol

• 228.3 g/mol

• 196.3 g/mol

The mole concept is important in chemistry because

• it allows us to distinguish between elements and compounds.
• atoms and molecules are very small and the mole concept allows us to count atoms and molecules by weighing macroscopic amounts of material.
• it establishes a standard for reaction stoichiometry.
• it provides a universally accepted standard for mass.

Tags

NGSS.HS-PS1-7

Molar mass is in units of ________.

• grams
• grams/mole
• mole
• moles/gram

Tags

NGSS.HS-PS1-7

What is the definition for Avogadro's number?

• number of grams per one mole of a substance

• whole number ratio that is a multiple of a chemical formula

• simplest, whole number ratio of a chemical formula

• 6.02 x 10²³ particles per one mole of a substance

How do I calculate the molar mass of a compound?

• It is always 6.02 x 10²³

• Find the atomic mass of every element in total and add them together

• It is always 1

• Number of moles x mass