Practice Exam for Test 2 How many Hydrogen atoms are in 12g of H

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Practice Exam for Test 2 How many Hydrogen atoms are in 12g of H
Practice Exam for Test 2
1.
How many Hydrogen atoms are in 12g of H2O?
2.
Balance the combustion reaction of C8H18 (octane).
3.
Calculate the theoretical yield of FeO (rust) in the double-displacement reaction between 5.0g
Aluminum Oxide and 3.75g Iron(II) Chloride.
4.
Calculate the percent yield of the reaction given 20ml of 2.00M Sulfuric acid reacting with 3.45g
of Barium Hydroxide. Assume that the volume difference after adding the Barium hydroxide is
negligible and that your precipitate’s mass was 3.93g.
5.
Calculate the percent yield of the reaction between 5.3g of Magnesium hydroxide and excess
hydrofluoric acid given the mass of the precipitate was 4.75g.
6.
Write the total ionic equation for the double displacement reaction between Potassium acetate
and Phosphorous acid.
7.
Write the net ionic equation for the reaction above.
8.
Liquid phosphorus trichloride is poured into a large excess of water. Write the net ionic
equation for this reaction.
PCl3(l) + H2O  H3PO3(aq) + H+(aq) + Cl-(aq)
Write the redox reactions for the remaining problems
9. CuS(aq) + HNO3(aq)  Cu SO4(aq) + NO (g) + H2O(l)
10. Zn(s) + HCl(aq)  ZnCl2(aq) + H2 (g)

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