The Mole Concept - Gen Chem

What is the difference between a formula unit and a molecule?

• formula unit - ionic compound

  molecule - covalent/molecular compound

• formula unit - big

  molecule - small

• formula unit - covalent/molecular compound

  molecule - ionic compound

• formula unit - small

  molecule - big

A mole of potassium chloride contains 6.02 x 10²³ _____.

• atoms
• formula units
• ions
• molecules

A mole of carbon dioxide contains 6.02 x 10²³ _____.

• atoms
• formula units
• ions
• molecules

A mole of carbon contains 6.02 x 10²³ _____.

• atoms
• formula units
• ions
• molecules

Which compound has the smallest molar mass?

• CO
• CO₂
• H₂O
• H₂O₂

Which of these has the greatest volume?

• 1 mole CO₂
• 1 mole of N₂O₄
• 1 mole of C₃H₈
• They all have the same volume

Which has more molecules?

• 1 mole CO₂
• 1 mole of N₂O₄
• 1 mole of H₂O
• They are all the same

Tags

NGSS.MS-PS1-1

What is the molar mass of lead(II) nitrate, Pb(NO₃)₂ ?

• 237.22 g/mol

• 283.22 g/mol

• 269.22 g/mol

• 331.22 g/mol

What is the molar mass of sodium (Na)?

• 11.45 g/mol

• 22.99 g/mol

• 1.01 g/mol

• 3.03 g/mol

How many moles of oxygen (O₂) are in 32.00 g of O₂?

• 6.02 x10²³ moles

• 2 moles

• 1 mole

• 1.93 x10²⁵ moles