Balancing chemical equations

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

• products
• reactants
• yield
• chemical formula

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

• Coefficient 
• Subscript
• Atom
• Equation

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

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-5

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-5

Is this balanced?
Al + O₂ → 2Al₂O₃

• Yes
• No

Tags

NGSS.MS-PS1-5

Balance this equation

_Al +_HCl --> _H₂ +_AlCl₃

• 2,6,3,2

• it's already balanced

• 4,12,3,4

• 2,1,4,5

Tags

NGSS.MS-PS1-5

Is the following reaction balanced?
NaHCO₃ --> Na₂CO₃ + H₂O + CO₂

• yes
• no

Tags

NGSS.MS-PS1-5

__Na + O₂ -----> __Na₂O

Balance it

• 2Na + O₂ ---> 4Na₂O

• 4Na + O₂ ---> 2Na₂O

• Na + O₂ ---> Na₂O

• 2Na + 2O₂ / 4Na₂O

Balance the following equation:

___ H₂+ ___ O₂→___ H₂O

• 1, 1, 3

• 2, 2, 2

• 1, 2, 1

• 2,1, 2

Tags

NGSS.MS-PS1-5

Balance the Chemical Equation

__Na + __H₂O --> __NaOH + __H₂

• 2,2 --> 2,1

• 4,4 --> 4,1

• 1,2 --> 2,4

• 1,2 --> 2,1