General Chemistry Answers

Solve the given problem with complete solution

10. One of the most harmful components of nuclear waste is a radioactive isotope of strontium,

90 Sr38 , it can be deposited in your bones, where it replaces calcium. How many protons are in the

nucleus of Sr-90.

Calculate the concentration of the chromic ion in the cell which has an electrode potential of 0.688 at 298.15 K for the given reaction:

Cr2O7 2 – (aq) + 14 H+ (aq) + 6 I – 1 (aq) → 2 Cr 3+(aq) + 3I2(s) + 7 H2O(l)

A galvanic cell consists of a chromium, Cr bar in a chromic sulfate solution, Cr2(SO4)3 containing 13 g and a silver, Ag bar in a silver sulfate solution (Ag2SO4 ) containing 37.8 g in a

3 L solution and a sodium sulfate solution use as a salt bridge solution. The silver electrode is positive relative to the chromium electrode. Write the cell half- reactions, overall reaction and cell notation.

Write the complete nuclear equations and its abbreviation equation from the following nuclear

reactions.

1. Krypton – 87 decays by beta emission.

2. Uranium – 232 decays by alpha emission.

3. Lutetium – 176 plus a bombarding particle results in the formation of lutetium – 177 and gamma rays.

4. 204 Po 84 + 0e – 1 → _____

5. K capture of a beryllium – 7.

6. B 10 (n, 2a) X (nuclear transmutation) shorthand method of writing a nuclear equation

7. Write the complete nuclear equations for the successive decay of lead – 211 by beta, alpha and

beta emission.

8. Fission of uranium – 236 forming bromine – 87 and lanthanum – 146 plus neutron.

9. Fusion of carbon -12 plus + helium – 4 results in the formation of oxygen – 16 and a decaying

particles

Iron reacts with hydrochloric acid to produce iron (II) chloride and hydrogen gas:

Fe_(s) + HCl_(aq) -----> FeCl₂ + H_{2 (g)}

The H₂ gas from the reaction of 300.0 g of iron with 300.0 g hydrochloric acid is collected in a 2000.mL flask at 20.00°C. What is the pressure of H₂ gas in this flask in bars? (1 atm = 1.01325 bars)

A 7.00 L tank at 0.543°C is filled with 8.89 g of dinitrogen difluoride gas, 9.41 g sulfur tetrafluoride gas and 9.93 g of chlorine pentafluoride gas. You can assume that the gases behave as ideal gases under these conditions.

Calculate the total pressure in the tank.

How many moles of O2 is required to produced 5 moles of O3

How many grams of barium is required to produce 3 mol of BaO

How many grams of nitogen must react oxygen to produce 34.54 g of nitrogen monoxide

A galvanic cell consists of a chromium, Cr bar in a chromic sulfate solution, Cr2(SO4)3

containing 13 g and a silver, Ag bar in a silver sulfate solution (Ag2SO4 ) containing 37.8 g in a

3 L solution and a sodium sulfate solution use as a salt bridge solution. The silver electrode is

positive relative to the chromium electrode. Write the cell half- reactions, overall reaction and

cell notation. Calculate the following:

A) Gibbs Free – Energy B) Electrode potential of the cell.