The Mole unit review

(0901) Avogadro’s number is:

• 6.02 x 10²²

• 6

• 6.02 x 10²³

• 3.01 x 10²³

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Avogardro's Number

(0901) Which conversion would you use if you need to convert from MOLES to particles?

• $\frac{1\ mole}{6.02\ x\ 10^{23}particles}$

• $\frac{6.02\ x\ 10^{23}moles}{1\ particle}$

• $\frac{6.02\ x\ 10^{23}particles}{1\ mole}$

• $\frac{1\ particle}{6.02\ x\ 10^{23}\ moles}$

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Conversions

(0901) How many water molecules are in 5.2 moles of water?

• 6.0 x 10²³ molecules

• 5.2 molecules

• 3.1 x 10²⁴ molecules

• 8.6 x 10^-24 molecules

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Conversions

(0901) How many moles of methane (CH₄) are in 1.24 x 10²⁶ molecules of methane?

• 6.02 x 10²³ moles

• 7.46 x 10⁴⁸ moles

• 978 moles

• 206 moles

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Conversions

(0902) The mass of one mole of a substance is called...

• molecular mass

• mole constant

• molar mass

• atomic weight

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molar mass

(0902) What is the molar mass of Ca(NO₃)₂?

• 148.096 g

• 164.086 g

• 102.055 g

• 70.084 g

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molar mass

(0902) What is the molar mass of carbon dioxide?

• 12.40 g/mol

• 16.55 g/mol

• 32.21 g/mol

• 44.01 g/mol

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molar mass

(0902) Which compound has the smallest molar mass?

• CO

• CO₂

• H₂O

• H₂O₂

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molar mass

(0903) How many moles are in 47 g of KCl (molar mass = 74.551 g/mol)

• 0.63 mole

• 1.6 moles

• 3500 moles

• 120 moles

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Conversions

(0903) Determine how many grams are in 0.36 moles of CCl₄ (molar mass = 153.82 g/mol)

• 150 g

• 55 g

• 0.0023 g

• 2.2 g

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Conversions