The Mole and the Avogadro Constant

How many atoms of iodine are in a mole of iodine?

• 53

• 63.55 g

• 126.9

• 6.02 x 10²³ 

In chemistry, a "mole" is:

• based on the volume of a substance

• a large number used to count particles

• the mass of an atom

Avogadro's number of representative particles is equal to one_____.

• gram

• kelvin

• kilogram

• mole

How many particles would be in 8.4 moles of Octane (C₈H₁₈)?

•  5.77 x 10²³

• 5.77 x 10²⁶ 

• 5.06 x 10²⁴ 

• 5.06 x 10²³ 

Which has more molecules?

• 1 mole of H₂O

• 1 mole of Al(OH)₃

• 1 mole of NaCl

• There are all the same

What is the mole used for?

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

• To measure the amount of bonding in a substance 

• To measure the amount of energy in a substance

• To measure the amount of grams in a substance

A mole of carbon disulfide contains 6.02 x 10²³ _____.

• atoms

• ions

• formula units

• molecules

Determine the number of atoms in 0.50 moles of zinc.

• 0.30 x 10²⁴ atoms

• 4.15 x 10^-24 atoms

• 2.71 x 10^-22 atoms

• 303 atoms

Five moles of Cl₂ has the same particles in five moles of O₂

• True

• False

How many moles are in 4.5 x 10²⁴ particles?

• 0.747 particles

• 0.747 mol

• 2.71x10⁴⁷ particles

• 2.71x10⁴⁷ mol