Do Now: List the name of each element in the compound. Count the number of atoms for each element in the compound.

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Do Now List the name of each element in the
compound. Count the number of atoms for each
element in the compound.

• 1. Mg3Bi2
• Magnesium 3
• Bismuth 2
• 2. 4FeO2H
• Iron 4
• Oxygen 8
• Hydrogen 4

• 3. 4NaAu(CN)2
• Sodium 4
• Gold 4
• Carbon 8
• Nitrogen 8
• 4. Pb(NO3)2
• Lead 1
• Nitrogen 2
• Oxygen 6

• 5. 5Hg(BrO3)2
• Mercury 5
• Bromine 10
• Oxygen 30

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Homework and Announcements

• Today Conservation of Matter Worksheet

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Conservation of Matter

• L.O. SWBA T determine whether a chemical reaction
  shows conservation of matter.

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Conservation of Matter
In a chemical reaction atoms are not created or
destroyed, they are only rearranged.
CH4 2O2
CO2 2H2O
(1 C, 4H , 4 O)
(1 C, 4 H, 4 O)
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Conservation of Matter

• Mass of Reactants Mass of Products

Reactants ? Products Example H2 O ?
H2O Example 10 g H2 15 g O ? 25 g of H2O
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Fe Cl2 ? FeCl3
What are the reactants?
1
1
What are the products?
2
3
Does this equation show conservation of matter?
No
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2Fe 3Cl2 ? 2FeCl3
What are the reactants?
2
2
What are the products?
6
6
Does this equation show conservation of matter?
Yes
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2Al 3O2 ? 2Al2O3
What are the reactants?
2
4
What are the products?
6
6
Does this equation show conservation of matter?
No
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4Al 3O2 ? 2Al2O3
What are the reactants?
4
4
What are the products?
6
6
Does this equation show conservation of matter?
Yes
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CaCl2 2AgNO3 ? 2AgCl Ca(NO3)2
What are the reactants?
1
1
2
2
What are the products?
2
2
2
2
6
6
Does this equation show conservation of matter?
Yes
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Summary

• Write a paragraph (3-4 sentences) reflecting on
  todays lesson.
• Helper Questions
• What is the conservation of matter?
• What is a subscript?
• What is a coefficient?
• How do we determine if an equation is balanced?

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Are you on Task?

• Conservation of Matter Worksheet.
• Chapter Outline 17.1 and 17.2