Mole Test Review

Avogadro’s number is:

• 6.02 x 10²²

• 6

• 6.02 x 10²³

• 3.01 x 10²³

Determine the number of moles in 5.2 x 10²² atoms of gold.

• 0.086 mole

• 0.52 mole

• 8.63 x 10⁴⁴ moles

• 3.1 x 10⁴⁶ moles

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

(0901) How many moles of methane (CH₄) are in 1.24 x 10²³ molecules of methane?

• 6.02 x 10²³ moles

• 7.46 x 10⁴⁶ moles

• 978 moles

• 0.206 moles

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

• molecular mass

• mole constant

• molar mass

• atomic weight

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

• 148.096 g

• 164.086 g

• 102.055 g

• 70.084 g

(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

(0902) Which compound has the smallest molar mass?

• CO

• CO₂

• H₂O

• H₂O₂

(0903) How many moles are in 74 g of KCl

• 0.99 mole

• 0.014 mole

• 11 moles

• 0.14 mole

(0903) Determine how many grams are in 0.36 moles of CCl₄.

• 150 g

• 55 g

• 0.0023 g

• 2.2 g