General Chemistry Answers

1. Draw the orbital diagram for the electronic configuration of atomic number 8. 

2. How many unpaired electrons does an oxygen atom possess? 

The common-ion effect refers to the decrease in solubility of an ionic precipitate by the addition to the solution of a soluble compound with an ion in common with the precipitate.. In this experiment, The common ion affects the solubility of the compound in a solution. For example, Ca(OH)2 dissociate into Ca2+ and OH− ions as follows; If Ca(OH)2 is added to a saturated solution of CaCl2 , the reaction shifts to the left to relieve the stress produced by the additional Ca2+ ion, in accordance with Le Châtelier’s principle. In quantitative terms, the added Ca2+ causes the reaction quotient to be larger than the solubility product (Q > Ksp), and Ca(OH)2 forms until the reaction quotient again equals Ksp. At the new equilibrium, [OH–] is less and [Ca2+] is greater than in the solution of Ca(OH)2 in pure water.

It this correctly explain about common ion effect on solubility?

1. How is Percent Composition of a molecule by atoms different then Percent Composition of a molecule by mass of? Explain using a molecule as an example.

1. Was the hypothesis that Double Stuffed contains twice as much creamy goodness supported or disproven?  Explain how you know. 

                Yes because 

1. In order to answer Question 2, did you use the mass of the cream filling OR % composition of the cream filling?   Explain your reasoning.

he chemical formula for Thimerosal salt is C9H9HgNaO2S

Since organic mercury compounds are toxic, when producing the vaccine preservative Thimerosal, we don’t want to have any left over, and therefore want to consume all of the organic mercuric reagent in the reaction. 

1. As a pharmaceutical chemist, you begin with 5.00 g of the RS-HgC2H5 reagent. How much thiosalicylic acid, in grams, is needed to ensure that no excess organic mercury is present at the end of the reaction.

1. What mass of the thimerosal salt will be produced from your reaction. You will need to draw your products from the acid base neutralization reaction.
   
2. Write an executive summary of your results and justify why you have made the decisions that you did.

What is the GFM for N₂O₆? (N = 14.0g, O = 16.0g)

Using a current of 30.0 amperes, how long will it take to produce 15.0 L of oxygen at 90 kPa and 20°C?

  If   you have a 28 g sample of N2 gas in a 0.5 L flask at a temperature of 29 C.  What must be the pressure.

and

A gas occupies a volume of 584 mL at a pressure of 770 mL of Hg.  When the pressure is changed, the volume becomes 603 mL  If the temperature stays constant, what is the new pressure in mm of Hg.

1.5 moles of a compound weigh 200 grams in an analytical balance. If molar mass of is 100 g mol^–1 then atomic mass of A is:

we have a solution that has a concentration of 0.309 M for A(aq) and 0.631 the reaccion M for B(aq) There are no other solutes initially the reaction 2A(aq)+ B(aq)------ 2C(aq)+ D(aq) take place at equilibrium the concentration of C (aq) is 0.124M what is the equilibrium constant of this reaction

The yellow light given off by a sodium vapour lamp used for public lighting has a wavelength of 589 nm. What is the frequency and energy of this radiation?