Chemistry 5.1 Review

Identify the number of atoms in 1 mole.

• 3.0×10^-10

• 3.0×10⁸

• 9.81

• 6.02×10²³

Identify the conversion factor needed to convert between moles and grams

• Molar Mass

• 6.02×10²³

• Mole Ratio

• Molarity

Round 189 to 2 significant figures

• 18

• 19

• 190

• 180

Round 0.8596 to 2 significant figures

• 0.8

• 0.9

• 0.86

• 0.85

Calculate the number of moles in 154g of Xenon.

Mathematical Equivalence

ON

Calculate the number of moles in 3.9×10²³ atoms of Arsenic (As).

Mathematical Equivalence

ON

Calculate the number of grams in 2.40 moles of Titanium (Ti).

Mathematical Equivalence

ON

Calculate the number of atoms in 5.9 moles of Argon (Ar).

Mathematical Equivalence

ON

Reorder the following from the fewest to the most significant figures.

• 111,000

• 100.0

• 1,000

• 11

Calculate the molar mass of Lead (Pb). Do not round your answer!

Mathematical Equivalence

ON