Moles and Avogadro's Number

Avogadro’s number is:

• 6.02 x 10²²

• 6

• 6.02 x 10²³

• 3.01 x 10²³

How many molecules are in 2.5 mol of NaCl?

• 51x10²³

• 46

• 4.15

• 51x10²⁴

How many water molecules are in 5.2 moles of water?

• 6.0 x 10²³ molecules

• 5.2 molecules

• 3.1 x 10²⁴ molecules

• 8.6 x 10^-24 molecules

To convert moles to mass one would

• multiply moles given by the molar mass in grams

• divide the moles given by the molar mass in grams

• simply use the molar mass for the given substance

• multiply the average atomic mass by the molar mass

The number 6.02 x 10²³ is called...

• Obama's number

• Bohr's number

• Trump's number

• Avogadro's number

A sample of silver contains 5.71 x 10²² atoms. How many moles of silver are present?

• 3.43 x 10⁴⁶ moles

• 0.0529 moles

• 0.0948 moles

• 10.5 moles

How many water molecules are in 5.2 moles of water?

• 6.0 x 10²³ molecules

• 5.2 molecules

• 3.1 x 10²⁴ molecules

• 8.6 x 10^-24 molecules

There are (a)   molecules in .5 moles of N₂O₅.

• A. 1.2 x 10²³ molecules

• B. 3.01 x 10²³ molecules

• C. 6.02 x 10²³ molecules

• D. 5.4 x 10²³ molecules

How many molecules are there in 2 moles of sodium chloride (NaCl)?

How many particles are in a mole?

• 602

• 602 million

• 602 moles

• 6.02 x 10²³