Law of Conservation of Mass

Multiple Choice

When two or more atoms come together, they form a what?

• Another Atom

• A Solid

• An Element

• A Molecule

Multiple Choice

The red numbers in the image below represent ________

• subscripts
• coefficients
• I don't know, and don't want to try
• None of the answers are correct

Multiple Choice

How many different kinds of elements are there?

• 1

• 3

• 5

• 8

Multiple Choice

What is the total number of atoms in the compound Li₂Cl₂?

• 4

• 2

• 3

• 5

Multiple Choice

What does the coefficient in the chemical formula 2Na₂SO₄ represent?

• The number of molecules

• The type of molecules

• The weight of the compound

• The temperature of the reaction

Multiple Choice

The left side of the equation below is called

• Products
• Reactants

Multiple Choice

The Law of Conservation of Mass states Matter is NEITHER created nor destroyed.

• True

• False

Multiple Choice

Which equation best represents the law of conservation of mass? 

• A
• B
• C
• D

Multiple Choice

If you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?

• 4 atoms
• 10 atoms
• 1 atom
• 5 atoms

Multiple Choice

How many grams of OXYGEN would be needed to show conservation of mass in the example below?

• 100 g

• 93 g

• 7 g

• 0 g

Multiple Choice

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

• A

• B

• C

• D

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident