Advanced Mole Conversions

How many moles are in a 18 L tank of nitrogen gas?

• 0.9 moles

• 1 mole

• 0.8 moles

• 0.75 moles

How many moles are in 89 liters of water vapor?

• 1993.6 moles

• 4.93 moles

• 1.478 moles

• 3.97 moles

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

A mole of carbon disulfide contains 6.02 x 10²³ _____

• atoms

• formula units

• ions

• molecules

Tags

NGSS.HS-PS1-7

The number 6.02 x 10²³ is called...

• Obama's number

• Bohr's number

• Trump's number

• Avogadro's number

How do we get mass from moles?

• multiply by avogadro's number

• multiply by molar mass

• divide by avogadro's number

• divide by molar mass

Tags

NGSS.HS-PS1-7

The mass of one mole of an element is equal to

• its atomic number from the periodic table, but in amus.

• its atomic mass from the periodic table, but in amus.

• its atomic mass from the periodic table, but in grams.

• its atomic number from the periodic table, but in grams.

How many molecules are in 2.5 mol of NaCl?

• x10²⁴ molecules

• molecules

• molecules

• x10²⁴ molecules

Calculate the number of atoms in 0.0340 g Zn.

• 5.200 x 10^-4 atoms Zn

• 3.130 x 10²³ atoms Zn

• 3.130 x 10²⁰ atoms Zn

• 1 atom Zn

Tags

NGSS.HS-PS1-7

How many moles are in 19.82 g Mg?

• 1.23 mol Mg

• 481.70 mol Mg

• 1.00 mol Mg

• 0.82 mol Mg