Quiz Unit 8 - The Mole

What is the value of Avogadro's number?

Tags

NGSS.HS-PS1-7

Match the following units with their descriptions in chemistry.

• Kelvin

• A unit of temperature

• Mole

• A unit of amount of substance

• Gram

• A unit of mass

• Liter

• A unit of volume

• 16 g/mol

• 18 g/mol

• 20 g/mol

• 22 g/mol

Tags

NGSS.HS-PS1-7

A sample of gas occupies 22.4 L at STP. (a)   moles of gas are present.

• 0.5 moles
• 1 mole
• 2 moles
• 3 moles

• 35.5 g/mol

• 58.5 g/mol

• 60 g/mol

• 75 g/mol

• 3 g

• 6 g

• 9 g

• 12 g

• 45 g

• 60 g

• 90 g

• 120 g

Explain why the concept of a mole is important in chemistry.

• It allows chemists to count atoms by weighing them.

• It provides a way to measure temperature.

• It is used to determine the color of substances.

• It helps in identifying the state of matter.

Tags

NGSS.HS-PS1-7

A gas at STP has a volume of 11.2 L. How many moles of gas are present?

• 0.25 moles

• 0.5 moles

• 1 mole

• 2 moles