Equations Balancing

When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced

• charge

• subscript

• random number

• coefficient

Balance this equation:
 2Li + Cl₂ -> LiCl

• 2Li + Cl₂ -> 4LiCl2

• 2Li + Cl₂ -> LiCl₂

• 2Li + Cl₂ -> 2LiCl

Tags

NGSS.MS-PS1-5

Which number should go in the blank?
_ H₂ + O₂ -> 2 H₂O

• 1

• 2

• 3

• 0

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance the following equation by filling in the blank:

N₂ + 6H₂ → _NH₃

Tags

NGSS.MS-PS1-5

To balance an equation you should:

• ONLY change subscripts.

• ONLY change coefficients.

• Change BOTH subscripts and coefficients.

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

Is the following equation balanced or unbalanced ? 
Al + O₂ --> Al₂O₃

• Balanced

• Unbalanced

Tags

NGSS.MS-PS1-5

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled

• the product is half the mass of the reactants

• the mass is the same

• the mass changes depending on the reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The blue numbers in the image below represent ________

• I don't know, and don't want to try

• coefficients

• subscripts

• none of the answers are correct

Which problem is balanced?

• PbO₂ + 2H₂

• SO₂ + H₂0 --> H₂SO₄

• 2Na + 2H₂O --> 2NaOH + H₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5