1. Week 11 1. How many atoms of oxygen are represented in 2 Ca(NO3)2?
2. Which of the following is true of a balanced equation?
The number of atoms per molecule remains the same.
The kinds of atoms remain the same.
The total number of molecules remains the same.
The number of atoms of each element remains the same

2. 3. What are the coefficients that will balance this reaction
3. What are the coefficients that will balance this reaction? ___ HCl (aq) + ___ Mg(OH)2 (aq)  ___ H2O (l) + ___MgCl2 (aq)
1,2,2,1 c. 2,2,1,1
2,1,2,1 d. 2,1,1,2
4. Which product is missing from this single replacement reaction? Cu (s) + H2SO4 (aq)  CuSO4 (aq) + ???
H (g) c. CuO (s)
H2 (g) d. O2 (g)

3. 5. What type of reaction can be represented by the following general chemical equation? AX + BY  BX + AY
Synthesis C. Decomposition
Single replacement D. Double replacement
6. The electrolysis of water is performed by passing an electric current through water to break the bonds that hold it together. What kind of reaction is this?
Synthesis C. Decomposition
Single replacement D. Double replacement