Show What You Know Quiz

Define the Law of Conservation of Mass

• The mass of the reactants is the same as the mass of the products

• The mass of the products is different than the mass of the reactants

• The mass of all reactants are changed during a physical or chemical change

• Matter changes when reacted or changed.

Check all that apply to the Law of Conservation of Mass

• The number of atoms of each element in the reactants is the same as the number of atoms of each element in the products

• The mass of the reactants is always equal to the mass of the products

• Mass doesn't exist

• Mass is never created nor destroyed

• Mass and weight are the same thing

Which letter or number in this equation is the subscript

• 6

• H

• 2

• O

What are the 7 types of evidence that show a chemical reaction

• Color, gas, light, texture, odor, size, temperature

• Color, gas, light, odor, precipitate, temperature, heat

• Texture, size, color, density, volume, gas, temperature

• Light, heat, size, temperature, precipitate, gas, density

Which letter or number is the coefficient

• H

• C

• 8 and 18

• 2

Is this equation balanced or unbalanced?

• Balanced

• Unbalanced

Which are chemical changes

• Hair cut

• Glass breaking

• Iron rusting

• Melting ice cream

If four hydrogen atoms react two hydrogen atoms, how many atoms will be in the product?

• 7

• 2

• 6

• 4

Mass is never created nor destroyed

• True

• False

Is this balanced or unbalanced

• Balanced

• Unbalanced