Mole Chalk Mini-Lab

Which is the best description of Avogadro’s number?

• Avogadro’s number varies depending on the substance

• Avogadro’s number can be calculated using the percent mass formula.

• Avogadro’s number is equivalent to the number of moles in a substance.

  
  

• Avogadro’s number does not vary depending on the substance. It is a constant.

  
  

What is the primary purpose of a Mole Chalk Mini-Lab?

• To measure the mass of chalk

• To determine the number of moles in a sample of chalk

• To calculate the density of chalk

• To observe the color change in chalk

In a Mole Chalk Mini-Lab, which chemical reaction is typically observed?

• Combustion of chalk

• Decomposition of chalk

• Neutralization of chalk

• Sublimation of chalk

Tags

NGSS.MS-PS1-2

If a piece of chalk has a mass of 5 grams, how many moles of chalk are present? (Molar mass of chalk is approximately 100 g/mol)

• 0.05 moles

• 0.5 moles

• 5 moles

• 50 moles

Which of the following is a key concept demonstrated in a Mole Chalk Mini-Lab?

• Conservation of mass

• Conservation of energy

• Conservation of momentum

• Conservation of charge

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the chemical formula for chalk?

Tags

NGSS.MS-PS1-1

During the Mole Chalk Mini-Lab, what is the significance of measuring the mass of chalk before and after the experiment?

• To calculate the change in volume

• To determine the number of moles reacted

• To find the density of chalk

• To observe the color change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which piece of equipment is essential for accurately measuring the mass of chalk in a Mole Chalk Mini-Lab?

• Graduated cylinder

• Balance scale

• Thermometer

• Burette

What is the role of hydrochloric acid in a Mole Chalk Mini-Lab?

• To dissolve the chalk

• To neutralize the chalk

• To oxidize the chalk

• To reduce the chalk

Tags

NGSS.MS-PS1-2

How does the concept of molar mass apply in a Mole Chalk Mini-Lab?

• It helps in determining the volume of chalk

• It is used to calculate the number of moles of chalk

• It is irrelevant to the experiment

• It determines the color of chalk

Tags

NGSS.MS-PS1-5