1. Law of Conservation of Matter (Mass)

2. CONSERVATION WARM-UP ACTIVITY 10/8/15
Write 3 things you think about when you see or hear the word
CONSERVATION

3. LAW OF CONSERVATION OF MATTER
Matter can neither be created nor destroyed in a chemical reaction.
In a chemical reaction, there are the same numbers and types of atoms before and after the reaction.

5. LAW OF CONSERVATION OF MATTER
EX: Formation of Water
The chemical reaction is written in an equation that looks like this:
2 𝐻 2 + 𝑂 2  2 𝐻 2 O
The items on the left side of the arrow are called reactants and the items on the right side of the arrow are called products.

6. CHEMICAL COMPOUNDS
Check the numbers and types of atoms on each side of the arrow.
Reactants Product
2 Hydrogen molecules Two molecules of water
(each molecule has two (each molecule has two
Hydrogen) = total of 4 hydrogen and one oxygen)
+ for a total of 4 hydrogen and
One oxygen molecule 2 oxygen
(each molecule has two
Oxygen) = total of 2

7. CHECK IT OUT!! Identify the numbers and types of atoms below:
CaCO3  CaO + CO2
One calcium, one carbon, and three oxygen atoms on each side

8. Mass of Reactants = Mass of Products
Reactants Products
Mass of Reactants = Mass of Products

10. Chemical reactions are represented on paper by
chemical equations.

20. Works Cited

21. TRUE OR FALSE
A. CH4 + 2 O2  1 CO2 + 2 H2O
C = C =
H = H =
O = O = .

22. True or False
B. 2 H2O + 1 O2  2 H2O
H = H =
O = O =

23. True or False
C. P + 5 O2  2 P2O5
P = P =
O = O =

24. True or False D. 2 C8H18 + 25 O2  16 CO2 + 18 H2O C = C = H = H =
O = O =

25. TRUE OR FALSE
A. TRUE
B. FALSE
C. FALSE
D. TRUE

26. Exit Ticket-Balanced or Not Show Work
1) N2 + 3H2  NH3
2) 2KClO3  KCl + 3O2
3) NaCl + F2  2 NaF + Cl2
4) 2 H2 + O2  2H2O