1. 8.5 DF Chemical Formulas and Equations
Review

2. Calcium, Chlorine, Oxygen
How many different elements are represented in the chemical formula Ca(ClO3)2 3
Calcium, Chlorine, Oxygen

3. What is the chemical formula for Potassium Chloride?
KCl

4. 2KCl shows 2 molecules of Potassium Chloride, how many total atoms of Chlorine are present?

5. What is the chemical formula for the model below?
2H2O2

6. Aluminum 1, Nitrogen 3, Oxygen 9
How many total Atoms are represented in the following Chemical Formula? Al(NO3)3 13
Aluminum 1, Nitrogen 3, Oxygen 9

7. How many total Atoms of Carbon are found in (CH3)2CO?

8. Calcium Chloride is made up of 1 Atom of Calcium and 2 Atoms of Chlorine, what is the formula for the Molecule?
CaCl2

9. Describe the Chemical Formula for 2BaCl2
2 Molecules, each made up of
1 Barium and 2 Chlorine

10. CaCO3  CaO + CO2
What is the Reactant? CaCO3 What is the Product? CaO + CO2 What is the symbol for Yield? ->

11. What is the description of the chemical reaction represented by the chemical equation below?
H2 + O2H2O2
2 Atoms of Hydrogen react with 2 Atoms of Oxygen and it Yields 1 Molecule of
Hydrogen Peroxide

12. How many molecules are there in the formula 4K2NO3?

13. How many atoms are there of each element in the formula 4K2NO3?
Potassium-8 Nitrogen-4 Oxygen-12

14. What is the product of the following equation?
H2CO3 H2O + CO2 H2O + CO2

15. What does the law of Conservation of Mass state?
Mass can neither be created nor destroyed.

16. Does the following equation follow the Law of Conservation of Mass?
BaSO4 + H2SO4  Ba(HSO4)2
YES

17. Does the following equation follow the Law of Conservation of Mass?
SO3 + 2H2O H2SO + H2SO4 - NO

18. How many atoms of oxygen are in a molecule of Carbon Dioxide?2

19. PRE-AP

20. __Fe +__ Cl2 __FeCl3 2 Fe + 3 Cl2 2 FeCl3
Balance this equation.
__Fe +__ Cl2 __FeCl3 2 Fe + 3 Cl2 2 FeCl3

21. Balance this equation.
__H2 +__ O2 __H2O 2 H2 +O2 2 H2O