Intro to Balancing Chemical Equations

Is this equation balanced?

N₂ + O₂ --> N₂O₂

• No

• Yes

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this equation balanced?

  Mg₂ + HCl --->  MgCl₂ + H₂

• Yes

• No

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the left part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical equation

What is the right part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical Equation

What is the arrow in a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactant

• Product

• Yields

Is the following equation balanced?
4Fe + 3O₂ --> 2Fe₂O₃

• yes

• no

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

So, the Law of Conservation of Mass would tell us that the mass of all the REACTANTS must __________ the mass of all PRODUCTS in a chemical reaction.

• equal

• be greater than

• be less than

Tags

NGSS.MS-PS1-5

What coefficient should be used to make the following equation balanced? N₂+O₂--> __?__NO

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

According to the Law of Conservation of Mass (Matter), Matter cannot be ​ (a)   or ​ (b)   , it can only be ​ (c)   . This means however many atoms of an element we have before a reaction must be ​ (d)   to the number after a reaction.

• created

• destroyed

• changed

• equal

Tags

NGSS.MS-PS1-5

What does the Law of Conservation of Mass say? It says, "During a chemical reaction, mass is neither _______ or destroyed."

• burned

• created

• melted

Tags

NGSS.MS-PS1-5