Balancing Equations

Is this equation balanced?

• yes
• no
• Not enough information
• Left side is balanced

Tags

NGSS.HS-PS1-7

Balance this equation by filling in the blanks with coefficients:

PCl₅ + ___H₂O →___HCl + H₃PO₄

• 4, 5

• 1, 6

• 3, 8

• 2,2

Which equation is balanced?

• PbO₂ + 2H₂ → H₂SO₄

• SO₂ + H₂O → H₂SO₄

• 2Na + 2H₂O → 2NaOH + H₂

• 2Na + H₂O → 2NaOH + H₂

Balance this equation by filling in the blanks with coefficients:

___Zn + ___HCl → ___ZnCl₂ + ___H₂

• 1,1,2,1

• 1,1,1,2

• 1,2,1,1

• 2,1,1,1

Balance this equation by filling in the blanks with coefficients:

___Mg + ___Cl₂ → ___MgCl₂

• 1, 2,1

• already balanced

• 2,1,1

• 1,1,2

Balance this equation:

P₄ + O₂ → P₂O₃

• 3P₄ + O₂ → 2P₂O₃

• P₄ + O₂ → 2P₂O₃

• P₄ + 3O₂ → 2P₂O₃

• P₄ + 2O₂ → 3P₂O₃

How should the total mass of the reactants compare 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

Balance this equation:

Al₂O₃ → Al + O₂

• Cannot be balanced

• 2Al₂O₃ → 2Al + 3O₂

• 2Al₂O₃ → 4Al + 3O₂

• 3Al₂O₃ → 2Al + O₂

Which elements are(is) not balanced?

LiNO₃ + CaBr₂ → Ca(NO₃)₂ + LiBr

• Li

• Ca and O

• O and N

• Ca

Balance the equation:

Si(OH)₄ + NaBr → SiBr₄ + NaOH

• Si(OH)₄ + 2NaBr → SiBr₄ + NaOH

• Si(OH)₄ + 4NaBr → SiBr₄ + 4NaOH

• Si(OH)₄ + NaBr → SiBr₄ + 4NaOH

• Si(OH)₄ + 2NaBr → SiBr₄ + 2NaOH