Avogadro Number

How many moles are in 3.01 x 10²² atoms of magnesium?

• 0.05 moles

• 1.81 x 10⁴⁶ moles

• 5.00 x 10²¹ moles

• 5 moles

A mole of carbon disulfide contains 6.02 x 10²³ _____

• atoms

• formula units

• ions

• molecules

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How many moles are 2.85 x 10²⁰ atoms of iron?

• 4.73 x 10^-4 moles

• 1.72 x 10⁴ moles

• 1.72 x 10^-42 moles

• 4.73 x 10⁴ moles

The number 6.02 x 10²³ is called...

• Mole's number

• Bohr's number

• Dalton's number

• Avogadro's number

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

• 53

• 63.55g

• 126.9

• 6.02 x 10²³

Why is the mole used in chemistry?

• The mass of atoms is in AMUs which is too hard to convert to grams.

• A dozen is not a scientific amount.

• Chemists needed to make chemistry easier to understand.

• It makes counting large numbers of small particles easier.

What are the units for Avogadro's number?

• meters

• particles

• grams

• liters

In chemistry, a "mole" is:

• The mass of an atom

• a large number used to count particles

• based on the volume of a substance

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NGSS.HS-PS1-7

Which has the most particles?

• mole H₂

• mole Na¹⁺

• mole Al(OH)₃

• These are all the same

What is Avogadro's number?

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NGSS.HS-PS1-5

NGSS.HS-PS1-7