Balancing Chemical Reactions

This is used to represent the number of each atom being represented. 

• A Exponent
• The Coefficient
• A Molecule
• The Subscript

Tags

NGSS.MS-PS1-1

This appears on the left side of a chemical formula, and represents how many molecules there are. 

• An Atom
• The Subscript
• A Molecule
• The Coefficient

Tags

NGSS.MS-PS1-1

How many oxygen atoms are in 2Fe₂O₃?

• 6 oxygen atoms
• 2 oxygen atoms
• 3 oxygen atoms
• 4 oxygen atoms

Tags

NGSS.MS-PS1-1

How many magnesium atoms are in 3MgCl₂?

• 3
• 5
• 1
• 6

Tags

NGSS.MS-PS1-1

Is this balanced?
2HgO → 2Hg + O₂

• Yes
• No

Tags

NGSS.HS-PS1-7

Is this balanced?
Al + O₂ → 2Al₂O₃

• Yes
• No

Tags

NGSS.HS-PS1-7

The Law of Conservation of Mass means that the number of atoms of the products is greater than the number of atoms in the reactants. 

• True
• False

Tags

NGSS.HS-PS1-7

What is a product?

• The left side of the equation.
• The right side of the equation
• The intermediate substances.

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-6

What type of reaction is:
Si + S₈ --> Si₂S₄

• Synthesis (combination)
• Decomposition
• Single replacement
• Double replacement

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What type of reaction is:
Ca + AlCl3 --> CaCl_{2 +} Al

• Synthesis (combination)
• Decomposition
• Single replacement
• Double replacement