Chemical Formulas And Equations Quiz
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1Chemical Formulas and Equations Quiz
1. Fill in the table with the appropriate answers.
Total number of
Chemical Formula
Total # of atoms
# of Molecules
elements
H
PO
3
4
3C
H
6
12
2H
0
2
2. Prove whether or not the equation below is balanced.
MgCO
+ 2HCl → MgCl
+ H
CO
3
2
2
3
3. The following reaction is represented in a balanced equation. Explain how the equation is
representative of the Law of Conservation of Mass.
2Na + 2H
O → 2NaOH + H
2
2
4. In a class lab, Emily added a piece of liver into a graduated cylinder containing hydrogen peroxide.
She observed foaming bubbles, an increase in the temperature, and a strong odor. Using this
information, answer the following questions.
A. What were Emily’s reactants?
B. What was at least one of the products that resulted from the reactants?
C. What evidence is there that new substances were created?
D. How are these substances different from her original reactants?
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