c127finp1f2000

1. Air is a

   homogenous heterogeneous mixure

2. Solubility is a

   chemical physical property.

3. An element (average mass = 374.5 amu) has 2 known isotopes. The heavier isotope has a natural abundance of 50.0% and a mass of 376 amu. The atomic mass of the lighter isotope is
4. The neutron to proton ration (n/p) of ³²S is

   4 3 2 1

5. The name of the group in the periodic table to which chlorine belongs is
6. The name (not the symbol) of the alkaline earth in Period 5 of the periodic table is
7. Ca²⁺ has a total of

   16 18 20 22 electrons.

8. A particle that is the nucleus of a helium atom is called an particle.
9. The sum of the number of protons and neutrons is called the
10. two atoms with the same number of protons but with different numebrs of neturons are called

1. Write the formula for dinitrogen tetraoxide (not grade on WWW)
2. Write the formula for iron (II) hypochlorite(not grade on WWW)
3. Write the formula for potassium dichromate (not grade on WWW)

Write the names of the following compounds
1. CoCO₃
2. HNO₂(aq)
3. H₂O₂

1. One hundred mL of a 0.05M solution of sodium sulfate is mixed with 100 mL of a 0.05 M soution of barium chloride. Write the formula of all the species present in the final solution. (Not graded on WWW)
2. Classify the following compounds
   1. HBr

      strong acid weak acid strong base weak base

   2. Ca(OH)₂

      strong acid weak acid strong base weak base

   3. NH₃

      strong acid weak acid strong base weak base

3. Consider the following balanced redox equuation in BASIC solution> 3Sn²⁺(aq))) + 2MnO₄^- (aq)+ 4H₂O 3 Sn⁴⁺(aq) +2MnO₂(s)) + 8OH^-(aq)
   1. The oxidizing agent in the reaction is

      permanganate anion stannic cation stannous cation manganese dioxide hydroxide anion water

   2. The specides that increases in oxidation number is

      permanganate anion stannic cation stannous cation manganese dioxide hydroxide anion water

   3. The species that contains the element with the highest oxidation number is

      permanganate anion stannic cation stannous cation manganese dioxide hydroxide anion water

   4. If the reaction were to take place in acid solution the species that would not be included in the reaction is

      permanganate anion stannic cation stannous cation manganese dioxide hydroxide anion water

   5. The name for the MnO₄^- ion is
   6. The name for the element Sn is
4. Part 3
   1. Write your answers below
      1. The symbol for the most electronegative element is
      2. Balance the following redox equation in acid medium and answer the following questions. The balanced equation itself will not be graded. Cu(s) + NO₃^-(aq) Cu²⁺(aq) + NO(g)
         1. The oxidation number of NO in NO₃^- is
         2. There are ? electrons loast in the oxidation half reaction
         3. There are ? electrons gained in the reduction half reaction
         4. There are ? moles of water produced in the overall reaction
         5. In the overall equation, the coefficient for Cu is

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