Balancing Check in

The coefficient in 3H₂O is

• 6

• 5

• 2

• 3

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

• 2
• 6
• 1
• 4

Number of H in 3(NH₄)₂CrO₄

• 4
• 6
• 8
• 24

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

• Reactants
• Products 
• Yields 
• Chemical Equation 

Is this equation balanced?

• Yes, everything appears the same amount on each side.

• No, there are too many oxygen on the left side.

Is this equation balanced?

• Yes, everything appears the same amount on each side.

• No, there are too many copper on the left side.

• No, there are too many oxygen on the left side.

Balance this equation.
_Mg + _Cl₂ --> _MgCl₂

• 1, 2,1
• already balanced
• 2,1,1
• 1,1,2

Balance this equation

_Al +_HCl --> _H₂ +_AlCl₃

• 2,6,3,2

• it's already balanced

• 4,12,3,4

• 2,1,4,5

Which problem is balanced?

• PbO₂ + 2H₂--> H₂SO₄
• SO₂ + H₂0 --> H₂SO₄
• 2Na + 2H₂O --> 2NaOH + H₂
• 2Na + 2H₂O --> 2NaOH + H

The blue numbers in the image below represent ________

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