19.1: Mole Concept & Combustion

What gas is produced when carbon reacts with oxygen during charcoal combustion?

• Carbon monoxide

• Nitrogen gas

• Carbon dioxide

• Oxygen gas

According to the balanced equation, how many oxygen molecules (O₂) react with each carbon atom (C)?

• 2

• 3

• 1

• 4

Tags

NGSS.HS-PS1-7

How many carbon dioxide (CO₂) molecules are produced per carbon atom that reacts?

• 2

• 1

• 3

• 4

Tags

NGSS.MS-PS1-5

What is the average mass of a carbon atom?

• 16.00 amu

• 32.00 amu

• 12.00 amu

• 44.01 amu

What is the mass of an O₂ molecule?

• 12.01 amu

• 16.00 amu

• 32.00 amu

• 44.01 amu

What is the mass of a CO₂ molecule?

• 28.02 amu

• 44.01 amu

• 32.00 amu

• 12.01 amu

Tags

NGSS.MS-PS1-1

Why do chemists use grams instead of amu when dealing with reactions?

• Because amu is more accurate

• Because reactions involve large numbers of particles

• Because grams are smaller units

• Because amu cannot measure atoms

How many carbon atoms are in 12.01 grams of carbon?

• 1.00 × 10²³

• 3.01 × 10²³

• 6.02 × 10²³

• 9.02 × 10²³

Tags

NGSS.HS-PS1-7

What is a mole (mol)?

• The mass of one atom

• A counting unit equal to 6.02 × 10²³ particles

• A chemical reaction rate

• The volume of a gas

What does molar mass represent?

• The number of molecules in a gas sample

• The mass of one particle in amu

• The mass in grams of one mole of a substance

• The density of an element

Tags

NGSS.HS-PS1-7