Quiz on Moles

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

• 53
• 63.55g
• 126.9
• 6.02 x 10²³

The number 6.02 x 10²³ is called...

• Obama's number
• Bohr's number
• Trump's number
• Avogadro's number

We use the periodic table to calculate...

• mass
• molar mass
• moles

What is the molar mass of C₂H₄O₂?

• 40g
• 50g
• 60g
• 68g

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

What would be the mass of 1.5mol H₂O

• 20
• 27
• 32
• 40

What is the mass of 0.75 moles of (NH₄)₃PO₄?

• 101.75 g
• 121.75 g
• 111.75 g
• 131.75 g

If I need 20.4 moles of sodium chloride, how much should I weigh out?

• 0.549 g
• 112 g
• 1192 g
• 5077 g

How many molecules would be in 8.4 moles of Octane (C₈H₁₈)?

• 5.77 x 10²³

• 5.04 x 10²⁴

• 5.77 x 10²⁶

• 5.04 x 10²³

How many molecules are in 32.4 grams of phosphorous pentoxide P2O5?

• 1.76 x 10²³ molecules
• 0.29 moles
• 1.76 x 10²² molecules
• 0.29 molecules