Mole Chalk Lab Dr. Harvey

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.

  
  

How many particles are in one mole of a substance?

• 602,000

• 1. It depends on the type of particle.

• 6.02

• 6.02 x 10^23    

What is the primary purpose of the Mole Chalk Lab conducted by Dr. Harvey?

• To measure the mass of chalk used in writing

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

• To calculate the density of chalk

• To observe the color change in chalk

In the context of the Mole Chalk Lab, which chemical formula represents chalk?

Tags

NGSS.MS-PS1-1

If Dr. Harvey uses 5 grams of chalk in the lab, how many moles of chalk are used? (Molar mass of chalk is approximately 100 g/mol)

• 0.05 moles

• 0.5 moles

• 5 moles

• 50 moles

Which of the following best describes a mole in chemistry?

• A unit of mass

• A unit of volume

• A unit of substance amount

• A unit of temperature

During the Mole Chalk Lab, what is the significance of using Avogadro's number?

• To calculate the mass of chalk

• To determine the number of particles in a mole of chalk

• To find the volume of chalk

• To measure the temperature change in chalk

What is Avogadro's number?

In the Mole Chalk Lab, if the chalk is completely consumed, what type of reaction is most likely occurring?

• Synthesis reaction

• Decomposition reaction

• Single replacement reaction

• Double replacement reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the role of a balanced chemical equation in the Mole Chalk Lab?

• To predict the color of the products

• To ensure the conservation of mass

• To determine the speed of the reaction

• To measure the temperature change

Tags

NGSS.HS-PS1-7