Balancing Chemical Equations

Which of the following equations are correctly balanced?

• 12CO₂ + H₂O ---> C₆H₁₂O₆ + O₂

• CO₂ + H₂O ---> 3C₆H₁₂O₆ + O₂

• CO₂ + 9H₂O ---> C₆H₁₂O₆ + O₂

• 6CO₂ + 6H₂O ---> C₆H₁₂O₆ + 6O₂

Tags

NGSS.MS-PS1-5

What is the little number after an element in a chemical equation called?

• Coefficient

• Atom

• Subscript

• Equation

Is the following equation balanced?

NaHCO₃ ---> Na₂CO₃ + H₂O + CO₂

• YES

• NO

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Balance this equation:
 2Li + Cl₂ -> LiCl

• 2Li + Cl₂ -> 4LiCl2

• 2Li + Cl₂ -> LiCl₂

• 2Li + Cl₂ -> 2LiCl

Tags

NGSS.MS-PS1-5

Is the following equation balanced?...
Al + O₂ --> 2Al₂O₃

• Yes!

• No!

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.

• Matter can only be lost in a chemical reaction.

• Matter can only be gained in a chemical reaction.

• Matter can be gained and lost in a chemical reaction. 

Tags

NGSS.MS-PS1-5

Balance this equation.
_SnO₂ +_H₂-->_Sn +_H₂O

• 1,1,2,1

• 1,2,1,1

• 1,2,1,2

• 1,2,2,1

Tags

NGSS.MS-PS1-5

Balance this equation
_Al +_HCl --> _H₂ +_AlCl₃

• 2, 6, 3, 2

• it is already balanced

• 4, 12, 3, 4

• 2, 1, 4, 5

Tags

NGSS.MS-PS1-5

Balance this equation.

__CF₄ + __Br₂ --> __CBr₄ + __F₂

• 2,1,2,1

• 1,2,2,1

• 1,2,1,2

• 2,2,2,2

Tags

NGSS.MS-PS1-5

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