Equations

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

• Balanced

• Unbalanced

Tags

NGSS.MS-PS1-5

Balance the following equation by filling in the blank:

N₂ + 6H₂ → _NH₃

(a)  

Tags

NGSS.MS-PS1-5

Which side of a chemical equation is the product side?

• Left (before the arrow)

• Right (after the arrow)

Which side of a chemical equation is the reactant side?

• Left (before the arrow)

• Right (after the arrow)

Which problem is balanced?

• PbO₂ + 2H₂

• SO₂ + H₂0 --> H₂SO₄

• 2Na + 2H₂O --> 2NaOH + H₂

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Balance this equation
_Zn+_HCl-->_ZnCl₂ +_H₂

• 1,1,2,1

• 1,1,1,2

• 1,2,1,1

• 2,1,1,1

Tags

NGSS.MS-PS1-5

Balance this equation.
_Mg + _Cl₂ --> _MgCl₂

• 1, 2,1

• already balanced

• 2,1,1

• 1,1,2

Tags

NGSS.MS-PS1-5

Is this balanced?...
Fe + S --> FeS

• YES!

• NO!

Tags

NGSS.MS-PS1-5

KNO₃ --> KNO₂ + O₂
What coefficients are needed to balance the reaction?

• 2, 2, 1

• 2, 3, 2

• 1, 2, 2

• 1, 3, 1

Tags

NGSS.MS-PS1-5

Balance this equation-
__P₄ + __O₂ --> __P₂O₃

• it is already balanced

• 2, 1, 3

• 1, 2, 3

• 1, 3, 2

Tags

NGSS.MS-PS1-5