Stoichiometry- mole concept

What is the molar mass of Carbon?

• 6
• 12
• 20
• 40

What is the molar mass of CO₂ to the ones place?

• 12
• 16
• 32
• 44

How many particles are in a mole?

• 602
• 602 million
• 602 moles
• 6.02 x 10²³

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

What is the molar mass of B₂(CO₃)₃?

• 81.632 g/mol
• 94.842 g/mol
• 38.822 g/mol
• 201.648 g/mol

Which compound has the smallest molar mass?

• CO
• CO₂
• H₂O
• H₂O₂

How many molecules of sugar (C₆H₁₂O₆) are in a mole?

• 24 molecules
• 180 molecules
• 180 g
• 6.02 x 10²³ molecules

The mole concept is important in chemistry because

• it allows us to distinguish between elements and compounds.
• atoms and molecules are very small and the mole concept allows us to count atoms and molecules by weighing macroscopic amounts of material.
• it establishes a standard for reaction stoichiometry.
• it provides a universally accepted standard for mass.

What id the molar mass of UF₆?

• 101 g/mol

• 238 g/mol

• 257 g/mol

• 352 g/mol

Calculate the molar mass of KOH.

• 28 g/mol

• 56 g/mol

• 84 g/mol

• 112 g/mol