1. Please write 5 signs that a chemical reaction is occuring.1
Please write 5 signs that a chemical reaction is occuring. 1. 2. 3. 4. 5.

2. 2
Write down each formula and label the Subscripts and Co-effecients. Define a Subscript? Define a Co-Effecients?
1. 2Na
2. NaOH
3. 2CaCO3

3. P4 + 6N2O  P4O6 + 6N2 3 1. Write and complete a RCP Chart?
Reactant Chem Product
1. Write and complete a RCP Chart?
2. Are the numbers of Atoms of each element in the reactant and products equal?
3. Is the equation balanced?

4. Write a Chemical formula for Methane.4
Write a Chemical formula for Methane. H H C H H

5. Are the follow equations balanced?5
Are the follow equations balanced?
Na + Cl2  NaCl
3H2 + N2  2NH3

6. Balance the following equation?
5 Pre-AP
Balance the following equation?
Na + Cl2  NaCl
H2 + N2  NH3

7. Label the Parts (A,B and C) of the Equation?6
Label the Parts (A,B and C) of the Equation? B A
______________  ______________ C

8. 2H2O2  2H2O + 2O2 7 1. Write and complete RCP Chart?
Reactant Chem Product
1. Write and complete RCP Chart?
2. Are the numbers of Atoms of each element in the reactant and products equal?
3. Is the equation balanced?

9. 2Na + Cl2  NaCl What is the Co-Efficient for sodium?8
2Na + Cl2  NaCl
What is the Co-Efficient for sodium?
What is the Subscript for Chlorine?
How many Na Molecules are present?

10. 9
2Bi + 4HNO3  Bi(NO3)3 + 2H2O + NO
Reactant Chem Product
1. Write and complete a RCP Chart?
2. Are the numbers of Atoms of each element in the reactant and products equal?
3. Is the equation balanced?

11. 10
Write at least 2 sentences that describes the Law of Conservaation of Mass. How are chemical formulas and equations different.

12. 11
Record the total number of atoms represented in each of the following. Record how many elements are in the following chemical formulas Record how many molecules are present in each of the following.
1. C12H22O11
2. 3CO2

13. Balance the Following Equation.
12 Pre-AP
Balance the Following Equation.
Na2SO4 + Mg  Na + MgSO4

14. Is the following Equation Balanced?12
Is the following Equation Balanced?
Na2SO4 + Mg  Na + MgSO4

15. How many elements are present in the follow equation?13
How many elements are present in the follow equation?
1. C12H22O11
2. 3CO2

16. How many Oxygen atoms are present in the follow equation?14
How many Oxygen atoms are present in the follow equation?
4HNO3

17. 15
Draw 3 Water molecules.

18. Draw the following molecules.16
Draw the following molecules.
1. 2HCl
2. 3H2O H
4. O2

19. Draw a Picture to represent the Law of Conservation17
Draw a Picture to represent the Law of Conservation