Intro to 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

How many atoms are there TOTAL in:
H₂SO₄

• 6
• 5
• 7
• 3

Tags

NGSS.MS-PS1-1

How many Elements are in the compound C₂H₈O ?

• 2
• 1
• 3
• 0

Tags

NGSS.MS-PS1-1

How many oxygen atoms are present in the following? 
4Ca(OH)₂

• 4
• 6
• 8
• 1

Tags

NGSS.MS-PS1-1

How many atoms of aluminum are on each side of the following equation: 4Al + 3O₂ --> 2Al₂ O₃

• 2
• 6
• 1
• 4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the right part of a chemical equation called...

H_{2 +} O₂ --> H₂O

• Reactants

• Products

• Yields

• Chemical Equation

What is the arrow in a chemical equation...
H_{2 +} O --> H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

In the equation shown, what are the reactant(s)?

• N₂ + H₂

• NH₃

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The red numbers in the image below represent ________

• subscripts
• coefficients
• I don't know, and don't want to try
• None of the answers are correct

Tags

NGSS.HS-PS1-7

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

• Coefficient 
• Subscript
• Atom
• Equation

Tags

NGSS.MS-PS1-1