Chemical Reaction Quiz

After you mix two substances together, a new substance forms.  This is an example of:
 

•  Physical Change
•  Chemical Change

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

How many Oxygen atoms are in H₂O?

• 1

• 2

• 0

• 4

How many Hydrogen atoms are in 4H₂O?

• 6

• 8

• 2

• 4

How many Oxygen atoms are in Al₂(SO₄)₃?

• 4

• 12

• 7

• 24

How many Nitrogen atoms are in (NH₄)₂CrO₄?

• 1

• 2

• 8

• 16

__Na + __Cl₂ --> __NaCl

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

Balance this reaction: ____ NaF + ____ Br₂ ---> ____ NaBr + ____ F₂

• 3,1,2,1
• 1,2,3,4
• 2,1,2,1
• 1,2,1,2

__H₂O₂ --> __H₂O + __O₂

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

Balance this equation:
Al₂O₃ -> Al + O₂ 

• 2Al₂O₃ -> 2Al + 3O₂ 
• 2Al₂O₃ -> 4Al + 3O₂ 
• 3Al₂O₃ -> 2Al + O₂ 
• 2Al₂O₃ -> 3Al + 2O₂