Writing and Balancing Chemical Equations

What is the part of the chemical equation in green called? Fe + S --> FeS

• products

• reactants

• yield

• chemical formula

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

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

Which problem is balanced?
(Check ALL answers)

• PbO₂ + 2H₂

• SO₂ + H₂0 --> H₂SO₄

• 2Na + 2H₂O --> 2NaOH + H₂

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Is this balanced?
Al + O₂ → 2Al₂O₃

• Yes

• No

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

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

• yes

• no

Tags

NGSS.MS-PS1-5

The substances that go into a reaction are called the _______.

• products

• reactants

Tags

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 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

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