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

The Law of Conservation of Mass says:

• Matter can be destroyed, but it can't be created.

• Matter can be created with any density as long as the volume remains constant.

• Matter cannot be created nor destroyed.

• Matter can change phases and still be the same substance.

Tags

NGSS.MS-PS1-5

If I have 100 grams of reactants, how many grams of products should I have?

• 0g

• 100g

• 50g

• 75g

Tags

NGSS.MS-PS1-5

H₃PO_{4 +} KOH ------> K₃PO₄ + H₂O

Is this equation balanced?

• yes

• no

• impossible to determine

Tags

NGSS.MS-PS1-5

Which choice shows this equation balanced?

K + B₂O_{3 ----->} K₂O + B

• 2K + B₂O_{3 ----->} K₂O + 3B

• K + 2B₂O_{3 ----->} 4K₂O + B

• 6K + B₂O_{3 ----->} 3K₂O + 2B

• balanced as is.

Tags

NGSS.MS-PS1-5

The _______ are on the left side of the equation and the _______ are on the right.

• products; reactants

• reactants; solutions

• solvents; products

• reactants; products

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

HCL + NaOH ---> NaCl + H₂O

Is this equation balanced?

• yes

• no

• Cannot determine

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

NGSS.MS-PS1-1

Choose the Answer that shows this equation balanced:

Na + O₂ ----> Na₂O₂

• Na + 3O₂ ----> Na₂O₂

• 2Na + O₂ ----> Na₂O₂

• Na + 2O₂ ----> Na₂O₂

• 3Na + 2O₂ ----> Na₂O₂

Tags

NGSS.MS-PS1-5

Choose the answer that shows this equation Balanced

N₂ + O₂ ----> N₂O₅

• 3N₂ + O₂ ----> 3N₂O₅

• 5N₂ + 2O₂ ----> 5N₂O₅

• 2N₂ + 5O₂ ----> 2N₂O₅

• Cannot be balanced

Tags

NGSS.MS-PS1-5