Balancing Chemical Equations

Is the equation balanced?: 2H₂O + O₂ --> 4MgO + 3Fe

• yes

• no

The coefficient in 3H₂O is

• 6

• 5

• 2

• 3

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3
• 6
• 12
• 24

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

Is this equation balanced?

• yes
• no
• Not enough information

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

• 1
• 2
• 3
• 4

Which problem is balanced?
(Check ALL answers)

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

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

• 1
• 2
• 3
• 4

Is this balanced?
Al + O₂ → 2Al₂O₃

• Yes
• No