The Mole Concept Part 1

What do we call the SI unit for amount of a substance?

• Avogadros number
• kilogram
• mole
• liter

A mole of potassium chloride contains 6.02 x 10²³ _____.

• atoms
• formula units
• ions
• molecules

Find the Molar Mass of:
Ga₂(SO₃)₃

• 280 g/mol
• 400 g/mol
• 380 g/mol
• 480 g/mol

A mole of Neon contains
6.02 x 10²³ _____.

• atoms
• formula units
• ions
• molecules

Determine the molar mass for CCl₄

• 153.8 g/mol
• 47.54 g/mol
• 189.35 g/mol
• 82.9 g/mol

How many molecules are in 2.00 moles of H₂O?

• 124x10²⁴ molecules of H₂O
• 1.20x10²³ molecules of H₂O
• 1.20x10²⁴ molecules H₂O
• 124

How many atoms are in 1.50 moles of Hg?

• 9.03x10²³ atoms Hg
• 9.03x10²⁴ atoms Hg
• 903 atoms of Hg
• 9.03 atoms of Hg

How many moles are in 3.01 x 10²² atoms of magnesium?

• 0.0500 moles
• 1.81 x 10⁴⁶ moles
• 5.00 x 10²¹ moles
• 5.00 moles

Calculate the number of iron atoms in an iron nail.

• 6.10 x 10^22
• 3.36 x 10^25
• 1.42 x 10^23
• 6.023 x 10^25

Calculate the number of copper atoms in a penny.

• 3.1 x 10^25
• 2.05 x 10^23
• 3.83 x 10 ^25
• 6.023 x 10^25