Balancing Formulas

Balance this equation.
_CH₄ + _O₂ --> _CO₂ + _H₂O

• 1,2,1,1

• 2,1,2,1

• 1,2,1,2

• 0,2,0,2

Tags

NGSS.MS-PS1-5

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

Tags

NGSS.MS-PS1-5

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

• 1

• 2

• 3

• 0

Tags

NGSS.MS-PS1-5

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

• Balanced

• Unbalanced

Tags

NGSS.MS-PS1-5

Which problem is balanced?

• PbO₂ + 2H₂

• SO₂ + H₂0 --> H₂SO₄

• 2Na + 2H₂O --> 2NaOH + H₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Fill in the blanks with coefficient:

PCl₅+_ H₂O→_ HCl+H₃PO₄

• 4, 5

• 1, 6

• 3, 8

• 2,2

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is an equation in which each side has the same number of atoms of each element called?

• Skeleton equation

• Balanced equation

• Catalyst

• Coefficient

Tags

NGSS.HS-PS1-7

Balance the following chemical equation: @@ ext{C}_3 ext{H}_8 + ext{O}_2 ightarrow ext{CO}_2 + ext{H}_2 ext{O}@@

• 1, 5, 3, 4

• 2, 7, 6, 8

• 1, 4, 3, 4

• 2, 5, 3, 4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When balancing chemical equations, what is the purpose of using coefficients?

• To change the chemical identity of the reactants

• To ensure the same number of each type of atom on both sides of the equation

• To increase the mass of the products

• To decrease the energy of the reaction

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Which of the following equations is balanced?

• @@ ext{N}_2 + 3 ext{H}_2 ightarrow 2 ext{NH}_3@@

• @@ ext{C}_2 ext{H}_4 + ext{O}_2 ightarrow 2 ext{CO}_2 + 2 ext{H}_2 ext{O}@@

• @@ ext{Fe}_2 ext{O}_3 + 3 ext{CO} ightarrow 2 ext{Fe} + 3 ext{CO}_2@@

• @@ ext{H}_2 + ext{O}_2 ightarrow ext{H}_2 ext{O}@@

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5