The Mole Unit Review

What is Avogadro's Number? 

• 6.02 x 10²³
• - 6.02 10²³
• 6.02 x 10²²
• 6,020,000,000,000

Tags

NGSS.HS-PS1-7

How many moles are in 8.30 X 10²³ molecules of H₂O?

• 1.38 X 10²³ moles H₂O

• 1.38 moles H₂O

• 2 moles H₂O

• 1 mole H₂O

Tags

NGSS.HS-PS1-7

How many molecules are there in 31.8 moles of water?

• 5.28 x 10^-23 molecules

• 1.91 x 10²⁵ molecules

• 5.28x 10^-25 molecules

• 1.91 x 10²³ molecules

A mole is:

• The SI unit for mass

• The SI unit for the amount of a substance

• The SI unit for volume

• The SI unit for area

How many moles there are in 5.68 x 10²⁴ formula units of AlCl₃?

• 3.42 x 10²⁴ moles

• 9.44 x 10²⁴ moles

• 9.44 moles

• 3.42 moles

Tags

NGSS.HS-PS1-7

What is correct equation that should be used to determine how many molecules there are in 0.75 moles of (NH₄)₃PO₄?

• 
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Tags

NGSS.HS-PS1-7

How many moles are in 4.5 x 10²⁴ atoms of lithium?

• 2.71 x 10⁴⁸ particles

• 7.47 moles

• 7.47 x 10²⁴ atoms

• 2.71 moles

Tags

NGSS.HS-PS1-7

What is the molar mass of dihydrogen dioxide?

• 48 g/mole
• 34.02 g/mole
• 36.5 g/mole
• 35.5 g/mole

Based on the info below, solve for the molecular formula:
Empirical formula = NO
Molecular formula mass = 59.98g

• NO
• N₂O₃
• N₂O₂
• N₄O₄

What is the molar mass of calcium hydroxide (Ca(OH)₂)?

• 74.10 g/mole
• 57.12 g/mole
• 58.19 g/mole
• none of the above