Unit 6 - Moles

What is the mass of one mole of Iron (Fe)?

• 55.85 amu
• 55.85 g
• 111.86 amu
• 111.86 g

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

• 53
• 63.55g
• 126.9
• 6.022 x 10²³

What is the molar mass of NaCl?

• 58.45 g/mol
• 28 g/mol
• 12 g/mol
• 6.02 x 10²³

What is the molar mass of C₂H₄O₂?

• 40 g/mol
• 50 g/mol
• 60 g/mol
• 68 g/mol

How do we get grams from moles?

• multiply by avogadro's number
• multiply by molar mass
• divide by avogadro's number
• divide by molar mass

Which has more molecules?

• 1 mole H₂O
• 1 mole Al(OH)₃
• 1 mole NaCl
• There are all the same

In chemistry, a "mole" is:

• The mass of an atom
• a large number used to count particles
• based on the volume of a substance

Calculating percent composition determines the ___________ of each element in a compound

• percent by mass
• percent by volume
• percent by number

The molar mass of an element is the mass in grams of one ____ of the element.

• atom
• molecule
• mole
• gram

Where do you look to calculate the molar mass of an element?

• Avogadros number
• Periodic table