Predicting and Balancing Chemical 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-PS1-2

NGSS.MS-PS1-5

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

• Reactants
• Products 
• Yields 
• Chemical Equation 

Tags

NGSS.MS-PS1-5

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

• Reactants
• Products 
• Yields 
• Chemical Equation 

Tags

NGSS.MS-PS1-5

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

• Coefficient 
• Subscript
• Atom
• Equation

When balancing equations what does
 -->       mean?

• subscript
• equals
• it is just an arrow
• yield

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

• Coefficient
• Subscript
• Atom
• Equation

What is the charge of Iron in this compound. (Hint: think criss cross method):

Fe₃(PO₄)₂

• 3+

• 2+

• 1+

• 6+

CaCO₃ represents a chemical

• Symbol
• Formula
• Subscript
• Reaction

Tags

NGSS.MS-PS1-1

Chemical equations

• give directions for naming compounds

• describe only biological changes

• describe chemical reactions

• show how to write formulas

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1