Balancing Chemical Equations

Balance this equation...

Sb₂S₃ + O₂ --> Sb + SO₂

• It is balanced

• Sb₂S₃ + 3O₂ --> 2Sb + 3SO₂

• Sb₂S₃ + O₂ --> 2Sb + SO₂

• What is Sb?

Tags

NGSS.MS-PS1-5

Balance this equation...
HgO --> 2Hg + O₂

• It is balanced 
• 2HgO --> Hg + O₂
• 2HgO --> 2Hg + O₂

Tags

NGSS.MS-PS1-5

Which of the following shows the correct way to balance the chemical equation?
Fe + O₂ -> Fe₂O₃

• 4Fe + 3O₂ -> 2Fe₂O₃
• 2 Fe + 3O₂ -> Fe₂O₆
• 4 Fe + O₆ -> 2Fe₂O₃
• None of the options are correctly balanced.

Tags

NGSS.MS-PS1-5

Which coefficients will correctly 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

Choose the coefficients that will correctly 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

How many Magnesium are in 10MgCl₂?

• 10
• 5
• 20

Tags

NGSS.MS-PS1-1

How many O's are in Al₂(SO₄)₃

• 4
• 12
• 7
• 24

Tags

NGSS.MS-PS1-1

Is this equation balanced?

• yes
• no
• Not enough information

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The law of conservation of matter states that

• chemical reactions change matter.
• in chemical reactions, the identity of reactants and products is conserved.
• atoms are neither created nor destroyed in chemical reactions.
• a chemical equation must be balanced.

Tags

NGSS.MS-PS1-5

Why is the following chemical equation not balanced?
H_{2 +} O₂ --> H₂O

• each side of the equation has a different number of oxygen atoms
• each side of the equation has a different number of hydrogen atoms
• each side has the same mass

Tags

NGSS.MS-PS1-5