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Law of Conservation of Matter (Mass)
WARM-UP ACTIVITY 10/8/15
• Write 3 things you think about when you see or hear the word
CONSERVATION
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.
LAW OF CONSERVATION OF MATTER• EX: Formation of Water
• The chemical reaction is written in an equation that looks like this:2 + 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.
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
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
Reactants ProductsMass of Reactants = Mass of Products
Chemical reactions are represented on
paper by chemical equations.
Works Cited• http://www.iun.edu/~cpanhd/C101webnotes/
matter-and-energy/masscons.html• http://wine1.sb.fsu.edu/chm1045/notes/Stoic
h/Equation/Stoich01.htm
TRUE OR FALSE• A. CH4 + 2 O2 1 CO2 + 2 H2O
C = C =
H = H =
O = O =
•.
True or False• B. 2 H2O + 1 O2 2 H2O
• H = H =• O = O =
True or False• C. P + 5 O2 2 P2O5
P = P =
O = O =
True or False
• D. 2 C8H18 + 25 O2 16 CO2 + 18 H2O
C = C =
H = H =
O = O =
TRUE OR FALSE• A. TRUE• B. FALSE• C. FALSE• D. TRUE
Exit Ticket-Balanced or NotShow Work
• 1) N2 + 3H2 NH3
• 2) 2KClO3 KCl + 3O2
• • 3) NaCl + F2 2 NaF + Cl2• • 4) 2 H2 + O2 2H2O