Mole, Mass, Avogadro's Constant

The number 6.02 x 10²³ is called...(definition for mole)

• Obama's number

• Bohr's number

• Trump's number

• Avogadro's number

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)

There are ______ number of molecules (atoms) of NaCl in one mole of NaCl? (hint: one mole is in the question)

• 6.02 x 10²³

• 1 mole

• 2

• Mr. Miller

How many moles of Na contain 1.45x10²¹ atoms of Na? (to find moles, divide atoms by Avogadro's number)

• 8.73x10⁴⁴

• 1.20x10²⁴

• 0.00241

• 1.45

5.11x10²³ atoms of lithium is equal to how many moles?

(to find moles, you must divide atoms by Avogadro's number)

• 1.18

• 0.351

• 1.34

• 0.849

How many moles are 2.85 x 10¹⁸ atoms of iron?

• 4.73 x 10^-6 moles

• 1.72 x 10⁴² moles

• 4.73 x 10⁶ moles

• 1.72 x 10^-6 moles

How many moles of copper are 4.57 x 10¹³ atoms of copper?

• 7.59 x 10^-11 moles

• 2.75 x 10³⁷ moles

• 7.59 x 10¹¹ moles

• 2.75 x 10^-37 moles

Tags

NGSS.HS-PS1-7

Avogadro's number of atoms/moles/formula units is equal to one_____.

• kilogram

• gram

• kelvin

• mole

Tags

NGSS.HS-PS1-5

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

• 53

• 63.55g

• 126.9

• 6.02 x 10²³

How many moles are in 6 x 10²³ molecules of H₂O?

• 1
• 2
• 6
• 600