Balancing Equations

Choose the answer that balances this equation.

H_{2 +} O_{2 -->} H₂O

• 2H_{2 +} O_{2 -->} 2H₂O

• 2H_{2 +} 2O_{2 -->} H₂O

• H_{2 +} 2 O_{2 -->} 2H₂O

• balanced already

Tags

NGSS.MS-PS1-5

Which choice shows this equation balanced?

• 2K + B₂O_{3 ----->} K₂O + 3B

• K + 2B₂O_{3 ----->} 4K₂O + B

• 6K + B₂O_{3 ----->} 3K₂O + 2B

• balanced as is.

Tags

NGSS.MS-PS1-5

Choose the answer that shows this equation balanced:

C + S₈ ----->CS₂

• 4C + S₈ ----->4CS₂

• 3C + S₈ -----> 2CS₂

• C + 2S₈ -----> 6CS₂

• 8C + S₈ -----> 4CS₂

Tags

NGSS.MS-PS1-5

Choose the answer that shows this equation Balanced

• 3N₂ + O₂ ----> 3N₂O₅

• 5N₂ + 2O₂ ----> 5N₂O₅

• 2N₂ + 5O₂ ----> 2N₂O₅

• Cannot be balanced

Tags

NGSS.MS-PS1-5

The numbers placed in ​ (a)   of formulas to balance equations are called ​ (b)   , and they multiply all the atoms in a ​ (c)   . Thus, the symbol “2NaHCO₃” indicates ​ (d)   units of sodium bicarbonate, which contain 2 Na atoms, 2 H atoms, 2 C atoms, and 6 O atoms

(2 X 3= 6, the coefficient times the subscript for O).

• front

• coefficients

• two

• formula

​ (a)   Fe₂O₃ + ​ ​ (b)   H₂ --> ​ ​ (c)   Fe + ​ (d)   H₂O

• 1
• 6
• 4
• 5
• 7
• 8
• 9
• 2
• 3

Tags

NGSS.MS-PS1-5

When balancing an equation, you can change the ​ (a)   of a substance, but you cannot adjust any ​​ (b)   because that would change the formula.

• coefficient

• subscript

Balance the Equation.

​ (a)   P₄ + ​ (b)   O₂ --> ​ (c)   P₂O₃

• 1

• 3

• 2

• 4

Tags

NGSS.MS-PS1-5

​​ ​ ​ (a)   KClO₃ ​→ ​ 2KCl ​ ​+ ​ ​ (b)   O₂

• 3

• 6

• 4

• 2

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance this equation:

​ (a)   FeCl₂ + ​ (b)   Cl₂ --> ​ (c)   FeCl₃

• 2

• 1

• 3

• 4

Tags

NGSS.MS-PS1-5