The Mole and Molar Mass

What is the definition of molar mass?

• 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 10^23 particles per one mole of a substance

Molar mass is in units of ________.

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

Tags

NGSS.HS-PS1-7

What is the molar mass of AuCl₃?

• 96 g
• 130 g
• 232.5 g
• 303.3 g

Tags

NGSS.MS-PS1-1

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 10^23 particles per one mole of a substance

What is the molar mass of oxygen gas O₂?

• 16 g

• 32 g

• 2 g

• 8 g

Which would have more atoms?

• 1 mole of Li
• 1 mole of Au
• 1 mole of Si
• None, all are equal

Tags

NGSS.MS-PS1-1

What is the mole used for? 

• To measure the amount of grams in a substance
• To measure the amount of atoms or molecules in a substance
• To measure the amount of energy in a substance
• To measure the amount of bonding in a substance 

1 mole of Ca and 1 mole of Na have the same number of atoms.

• True

• False

1 mole is equivalent to 6.02 x 10²³

• False

• True

What is a mole?

• The standard “unit” for measuring the amount of particles in a substance.

• The abbreviation for the term molecule.

• The relative mass of one atom of an particular element.

• A dark, hairy spot on your arm.