Some Basic Concepts of Chemistry Mole Concept

What do we call the chemistry unit to quantify the amount of a substance?

• particles

• kilogram

• mole

• liter

One mole is equal to how many particles (molecules, atoms)?

• 6.02 x 10²⁴

• 6.02 x 10²³

• 6.02 x 10²⁵

• 6.02 x 10²⁶

Find the Molar Mass of:
Ga₂(SO₃)₃

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

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

The mass of one mole of a substance is known as the

• Molar Mass

• Formula

• Chemical Equation

• Chemical Mass

What is the mass of 4.5 moles of water?

• 24.5 g

• 81.0 g

• 85.6 g

• 68.5 g

What is the number of moles in 222.0 g of Ca(OH)₂

• 4 moles

• 5 moles

• 2 moles

• 3 moles

Which has more molecules?

• 1 mole H₂O
• 1 mole Al(OH)₃
• 1 mole NaCl
• There are all the same

How many atoms of carbon are in 6.00 g of carbon?

• 1.20x10²⁴ atoms C

• 6.02x10²³ atoms C

• 3.01x10²³ atoms C

• 1.50x10²³ atoms C