Chemical Reactions/Balancing Equations

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.

• Matter can only be lost in a chemical reaction.

• Matter can only be gained in a chemical reaction.

• Matter can be gained and lost in a chemical reaction. 

Tags

NGSS.MS-PS1-5

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactants

• Products 

• Yields 

• Chemical Equation 

What is the right part of a chemical equation called...
2H_{2 +} O₂ --> 2H₂O

• Reactants

• Products 

• Yields 

• Chemical Equation 

Tags

NGSS.MS-PS1-5

How many Mn atoms are found in the following compound?
3Cr(MnO₄)₆

• 3

• 4

• 6

• 18

Tags

NGSS.MS-PS1-1

What is the little number after an element in a chemical equation called.
Example: H₂

• Coefficient 

• Subscript

• Atom

• Equation

Is the following equation balanced?...
Al + O₂ --> 2Al₂O₃

• Yes!

• No!

Tags

NGSS.MS-PS1-5

Element or compound?
H₂O

• Element

• Compound

Tags

NGSS.MS-PS1-1

What is the number before a chemical formula called?
Ex: 2H₂ + O₂ --> 2H₂O

• Coefficient

• Subscript

• Atom

• Equation

How many aluminum atoms are in Al₂(SO₄)₃?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Is the following equation balanced?
2C₂H₂ + 5O₂ --> 4CO₂ + 2H₂O

• yes

• no

Tags

NGSS.MS-PS1-5