The mole and molar mass

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

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NGSS.HS-PS1-7

What is the molar mass of H₂O?

• 6.02 x 10²³
• 16 grams
• 18 grams
• 15.99999 grams

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? 

• 6.02 x 10²³
• 58 
• 11
• 17

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NGSS.HS-PS1-7

How many moles are in 32 grams of Oxygen (O)? 

• 3
• 2
• 1
• 4

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NGSS.HS-PS1-7

How many moles are in 20 grams of Ca (Calcium)?

• 0.5 
• 1
• 3
• 20

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 

What is the molar mass when you have 4 moles of CO₂?

• 176 grams

• 54 grams

• 128 grams

• 280 grams

Tags

NGSS.HS-PS1-7

What is the difference between the atomic mass of an element and the molar mass of a compound?

• The atomic mass is the added sum of ALL of the elements

• The molar mass can be either the added sum of ALL the masses or the mass of a particular element

• The molar mass and the atomic mass are always the same

• The atomic mass of a compound is the average of H₂O