Introduction to the Mole (chemistry)

What is the mole used for? 

• To measure the amount of grams in a substance
• To measure the amount of atoms or molecules in a substance
• To measure the amount of energy in a substance
• To measure the amount of bonding in a substance 

What is Avogadro's Number? 

• 6.02 x 10²³
• - 6.02 10²³
• 6.02 x 10²²
• 6,020,000,000,000

Tags

NGSS.HS-PS1-7

Get your calculator and periodic table out!

What is the molar mass of H₂O?

• 6.02 x 10²³

• 16 grams

• 18 grams

• 15.99999 grams

Get your calculator and periodic table out!

What is the molar mass NaCl?

• 58 grams

• 22.95 grams

• 162 grams

• 6.02 x 10²³

How many atoms are in 1 mole of NaCl?

(Hint no need for a calculator!)

• 6.02 x 10²³

• 58

• 11

• 17

How are the mole and atomic masses of elements related?  

• The atomic mass of any substance is always equal to 1 mole of that substance 
• The atomic mass added up with itself by 6.02 x 10²³ equals the amount of atoms
• The atomic mass is the amount of protons plus number of atoms
• Atoms combined make up molecules, which are the measurement of atomic masses 

Why is the mole used to measure the atom?

• Atoms are extremely tiny particles, and their size varies from element to element

• Atoms are all the same size for every element

• Some atoms cannot be counted using the mole

• Tu eres loco, Senior Hagerman.

What is this number called?

• Avocado's Number

• Avogadro's Number

• Mendeleev's Number

• The mole

How many moles are in 6.02 x 10²³ molecules of H₂O?

• 1 mole

• 2 moles

• 6.02 moles

• 602000000000000000000000 moles

Tags

NGSS.HS-PS1-7

One mole of carbon dioxide (CO₂) contains 6.02 x 10²³ _____.

• atoms

• formula units

• ions

• molecules