Moles, molar mass, & basic stoichiometry

What is the mole in chemistry?

• a unit chemists use for counting particles, formula units, atoms, and molecules

• Avogadro's number

• 6.02 x 10²³

• six hundred two sextillion

• All of the above

If you have one mole of Au, one mole of Ag, one mole of Pt, and one mole of Pd, which of the following is true?

• each molar amount takes up the same amount of space

• each molar amount has the same number of atoms

• each molar amount has the same mass

• each molar amount has the same density

What is the total number of molecules in one mole of Fe₂O₃?

• 3.01 x 10²⁴

• 5

• 6.02 x 10²³

• 6

Which 2 quantities contain the same number of atoms?

• 1 mole of C₂H₄ and 2 moles of H₂O

• 1 mole of HCl and 1 mole of H₂O

• 3 moles of NH₃ and 5 moles of H₂O

• 2 mole of H₂O₂ and 2 moles of H₂O

13 moles of KCl is equal to:

• 7.83 x 10²⁴ molecules KCl

• .13 molecules

• 53.83 g KCl

• 6.02 x 10²³ molecules KCl

What is the atomic mass of F?

• 6.02 x 10²³

• 19.00 atoms

• 24.31 g

• 19.00 g

What is the molar mass of HCl?

• 70.90 g

• 1.204 x 10²⁴ g

• 6.02 x 10²³ g

• 36.46 g

What is the molar mass of CH₃COC₂H₅?

• 6.02 x 10²³ g

• 7.826 x 10²⁴ g

• 72.12 g

• 67.07 g

What is the molar mass of Al₂(SO₄)₃?

• 342.17 g

• 150.03 g

• 1.02 x 10²⁵ g

• 6.02 x 10²³ g

How many molecules of CO₂ are in 220.05 g of CO₂

• 5

• 30.1

• 3.01 x 10²⁴

• 6.02 x 10²³