Cons of Mass & Balanced Equations

The Law of Conservation of Mass states that Mass CAN be CREATED or DESTROYED in a chemical reaction.

• True

• False

Tags

NGSS.MS-PS1-5

1. In a chemical reaction, the Mass of the Reactants is always larger than the Mass of the Products.

• True

• False

Tags

NGSS.MS-PS1-5

Which of the following best describes a balanced chemical equation?

• The number of atoms of each element is the same on both sides of the equation.

• The number of reactants is equal to the number of products.

• The number of coefficients on the reactant side is equal the the product side.

Tags

NGSS.MS-PS1-5

Is this reaction balanced or not balanced?

• Balanced:

  All atoms are equal on both sides.

• Not Balanced:

  White atoms are not equal on both sides.

• Not Balanced:

  Red atoms are not equal on both sides.

• Not Balanced:

  All atoms are unequal on both sides.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this equation balanced?

• Balanced

  All atoms are equal on both sides.

• Not Balanced:

  All atoms are unequal on both sides.

• Not Balanced:

  Blue atoms are unequal on both sides.

• Not Balanced:

  Red atoms are unequal on both sides.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this equation balanced?

• Balanced

  All atoms are equal on both sides.

• Not balanced:

  White atoms are unequal.

• Not balanced:

  Black atoms are unequal.

• Not balanced:

  Red atoms are unequal

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Fe + O₂ → Fe₂O₃

• Balanced

  All atoms are equal on both sides.

• Not balanced

  O's are unequal.

• Not balanced:

  Fe's are unequal.

• Not balanced:

  Both atom types are unequal.

Tags

NGSS.MS-PS1-5

Which type of reaction is this:

Fe + O₂ → Fe₂O₃

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

2Fe + H₂O → Fe₂O₃ + H₂

• Balanced:

  All atoms are equal on both sides.

• Not Balanced:

  All atoms are unequal.

• Not Balanced:

  Fe atoms are unequal.

• Not Balanced:

  O atoms are unequal.

• Not Balanced:

  H atoms are unequal.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

2Fe + H₂O → Fe₂O₃ + H₂

Type of reaction?

• Synthesis

• Decompostion

• Single Replacement

• Double Replacement

• Combustion