Mole Concept & Molar Mass

The term mole, as used by chemists, is most similar in use to which of these common units?

• gallon

• dozen

• meter

• degree

The mole concept is important in chemistry because

• atoms and molecules are very small and the mole concept allows us to count atoms and molecules by weighing macroscopic amounts of material.

• it allows us to distinguish between elements and compounds.

• it establishes a standard for reaction stoichiometry.

• it provides a universally accepted standard for mass.

The number of atoms in a mole of atoms is

• 12

• 6.626 x 10^-34

• 2.998 x 10⁸

• 6.02 x 10²³

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

The molar mass of an element is the mass of one ____ of the element.

• atom
• molecule
• mole
• gram

Tags

NGSS.MS-PS1-5

Molar mass is in units of ________.

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

Tags

NGSS.HS-PS1-7

The numerical value for the molar mass of any monatomic element is equivalent to its

• atomic number

• mass number

• atomic mass

• valence electrons

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 10²³ particles per one mole of a substance

The molar mass of carbon is

• 6.00 g/mol

• 12.01 u

• 12.01 g/mol

• 24.02 g/mol

What is the element symbol for potassium?

• P

• K

• Pb

• Po