Question

Step 4: Build models of the products.

a) Use gumdrops and toothpicks to build a model of CaO and a model of CO2.
b) Be sure to use the same colors of gumdrops for calcium, carbon, and oxygen as you did in
Step 3. Include a key of your chosen color scheme with your models.
d) Use the models below as your guide. The lines represent the bonds.
Ca =
0
O=C=0
Step 5: Type one to two paragraphs that describe your models and explain the conservation of
mass in the chemical reaction.
a) Create a new blank document. Type your name at the top.
b)
Type one to two paragraphs that describe your models and relate them to the law of
conservation of mass. Your document should:
i. identify the names of the reactants and products in the reaction.
ii. identify the number of molecules that make up the reactants and products.
iii. identify the type and number of atoms in each molecule of the reactants and products.
iv. explain what happens during the chemical reaction.
v. explain how mass is conserved during the chemical reaction.
Step 6: Evaluate your project using this checklist.
If you can check each criterion below, you are ready to submit your project.
to an accurate model of calcium carbonate (CaCO3)? Your model should include
incictont use of

Answer 1

Answer: In Step 4, you are tasked with building models of CaO (calcium oxide) and CO2 (carbon dioxide) using gumdrops and toothpicks. It's important to use the same color scheme you used in Step 3, and provide a key for the colors you've chosen for calcium, carbon, and oxygen.

Here's a potential key for your color scheme:

- Calcium: [Insert Color]

- Carbon: [Insert Color]

- Oxygen: [Insert Color]

For Step 5, where you describe your models and relate them to the law of conservation of mass, you can create a document and include the following information:

i. Reactants and Products:

- Reactants: CaO

- Products: CO2

ii. Number of Molecules:

- Reactants: 1 molecule of CaO

- Products: 1 molecule of CO2

iii. Type and Number of Atoms in Each Molecule:

- CaO: 1 calcium atom and 1 oxygen atom

- CO2: 1 carbon atom and 2 oxygen atoms

iv. Explanation of the Chemical Reaction:

In the chemical reaction, CaO reacts with carbon to produce CO2.

v. Explanation of Mass Conservation:

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. In this reaction, the mass is conserved because the total mass of the reactant (CaO) is equal to the total mass of the product (CO2). The number of atoms remains the same; they are just rearranged in the chemical reaction.

After completing these steps, you can use the checklist in Step 6 to evaluate your project and ensure that you have met all the criteria before submitting it.