THE MOLE CONCEPT

Which of the following represents 1 mole of particles?

• 6.022 x 10²³ particles

• 6.022 x 10²² particles

• 6.22 x 10²³ particles

• 6.023 x 10²² particles

The sum of the atomic masses of all atoms in a ionic compound is called:

• molecular weight
• formula mass
• mass number
• atomic number

It is sum of the atomic masses of all atoms in a covalent molecule.

• Atomic number
• Molar mass
• Elemental weight
• Molecular mass

Which scientist is credited for the hypothesis that equal volumes of gases contain equal numbers of molecules?

• Robert Boyle
• Joseph Louis Gay-Lussac
• John Dalton
• Amedeo Avogadro

I have 3 dozen of eggs.

• 12

• 24

• 36

• 48

The standard scientific unit used to measure very large quantities of tiny particles such as atoms, molecules, ions, or electrons.

• mole
• gram
• liter
• joule

Molar mass of CaCO₃ (Calcium carbonate)

• 100.09 g/mol
• 95.10 g/mol
• 102.45 g/mol
• 98.00 g/mol

Molar mass of CH₄ (Methane)

• 18.02 g/mol
• 12.01 g/mol
• 16.04 g/mol
• 22.41 g/mol

The number 6.022×10²³ is named after:

• Amedeo Avogadro
• Dmitri Mendeleev
• Robert Boyle
• John Dalton

What is the unit of molar mass?

• (g/mol)

• u

• (mol/g)

• mol