mole avagadro number

Multiple Choice

How many zinc(II) atoms are in 65.4 grams of zinc (Zn). (Hint: Look at the periodic table for the Molecular Weight of Zinc. Remember that Grams = MW x Moles)

• 10

• 4,277.2

• 6.02x10²³

• 130.8

Multiple Choice

How many atoms are in 117.3 grams of Potassium? Hint: Look at the periodic table and use your calculator

• 1.80x10²⁴ atoms

• 39.1 atoms

• 3 atoms

• 6.02x10²³ atoms

Multiple Choice

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

Multiple Choice

When comparing a mole of oxygen and a mole of sulfur, how many atoms does each have?

• oxygen has 16 grams of atoms

• sulfur has 32.06 grams of atoms

• both contains 6.02 x 10²³ atoms

• can not be determined

Multiple Choice

How can you figure out how particles (atoms) there are in 2 moles?

• 2

• 2 x (6.02 x 10²³)

• 2 x (atomic mass)

• 2 ÷ (6.02 x 10²³)

Multiple Choice

Which of the following statements regarding the mole is correct?

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

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

• 1 mole = Avogdro's number

• all of the above