Which of the following is the definition of spectral interference in plasma and flame atomic emission spectrometry?

What is the ground electronic configuration of phosphorous? How many microstates does this configuration contain? Write the spin arrow diagram for phosphorus. Derive the term and state symbols. How many microstates does each state contain? Which state is the ground state?

1. If some NH4Cl is added to an aqueous solution of NH3:

   	A.	the pH of the solution will decrease
   	B.	the solution will not have pH
   	C.	NH4Cl cannot be added to NH3
   	D.	the pH of the solution will increase
   	E.	the pH of the solution will not change

Discussion about:

Nuclear Energy

There are different public opinions about using nuclear energy in producing electrical energy. Nuclear reactors are associated with harmful nuclear radiation and there is a problem of the storage of the nuclear waste. Discuss this issue from a scientific point of view giving your stand and explain why.

typing please no hand writing

An unidentified covalent molecular compound contains only carbon, hydrogen, and oxygen. When 5.00 mg of this compound is burned, 11.61 mg of CO2 and 1.27 mg of H2O are produced. The freezing point of camphor is lowered by 34.4°C when 4.705 g of the compound is dissolved in 19.25 g of camphor (Kf = 40.0°C kg/mol). What is the molecular formula of the unidentified compound? Choose appropriate coefficients in the molecular formula below.

C H O

There are two sodium acetate solutions. Their apparent concentrations are 1.00 x 10^-1 M and 1.00 x 10^-10 M, respectively. Please find the pH and true concentration (M) of acetic acid, and sodium acetate in these two solutions, respectively. The pKa of acetic acid is 4.75.

Also, can you use the same indicator for the following titration? Why? Please reason your answers with at least two criteria. (a) HCl titrated by NaOH, and (b) NaOH titrated by HCl.

Consider the following reaction and calculate the standard Gibbs Free Energy for it.

2 NO + O2 --> 2 NO2

Given that delta H= -114.1 kJ and delta S= -146.5 kJ. Also comment on the spontaneity or otherwise of this reaction at 298 K. Are there any conditions in which your answer might be different? If so state this condition

Consider the titration of a 20.0 mL sample of 0.105 M HC₂H₃O₂ with 0.125 M NaOH.

Determine each quantity:

a. the initial pH

b. the volume of added base required ot reach equivalence point

c. the pH at 5.0 mL of added base

d. the pH at one-half of the equivalence point

e. the pH at the equivalence point

f. the pH after adding 5.0 mL of base beyond the equivalence point

Please add explanations!

You have been provided a mixture containing four amino acids (Glu, His, Pro and Lys) to be separated by ion-exchange chromatography using a Dowex 50 cation-exchange, prepared in a loading buffer at pH 2.0. The following solutions are made available:

• The amino acid mixture in 0.04M citrate buffer at pH 2.0.

• 0.04M citrate buffer, pH 4.5

• 0.04M citrate buffer, pH 8.0

• 0.04M citrate buffer, pH 10.5

  Is complete resolution of all amino acids achieved if the buffers are allowed to elute through the column sequentially from lowest to highest pH? Identify the order of elution and identify any amino acids that may come off the column together if complete resolution is not achieved. Support your response with an explanation.
  Assuming the amino acids in the mixture will elute from the column ONLY at a solution pH that is above their respective pI.

1. An anion-exchange resin can be used instead of the cation-exchange resin in this experiment to separate the three amino acids in the known mixture. What changes to experimental protocol are required to achieve complete resolution? Support your response with an explanation. (HINT: consider pH).

2. You have been provided a mixture containing four amino acids (Glu, His, Pro and Lys) to be separated by ion-exchange chromatography using a Dowex 50 cation-exchange, prepared in a loading buffer at pH 2.0. The following solutions are made available:

3. The amino acid mixture in 0.04M citrate buffer at pH 2.0.

4. 0.04M citrate buffer, pH 4.5

5. 0.04M citrate buffer, pH 8.0

6. 0.04M citrate buffer, pH 10.5

   Is complete resolution of all amino acids achieved if the buffers are allowed to elute through the column sequentially from lowest to highest pH? Identify the order of elution and identify any amino acids that may come off the column together if complete resolution is not achieved. Support your response with an explanation.
   Assuming the amino acids in the mixture will elute from the column ONLY at a solution pH that is above their respective pI.

A 1.159 g sample contains only vitamin C (C6H8O6) and sucralose (C12H19Cl3O8). When the sample is dissolved in water to a total volume of 34.0 mL, the osmotic pressure of the solution is 4.06 atm at 297 K. What is the mass percent of vitamin C and sucralose in the sample?

Comments: No Ionization of Vitamin C

I need to find the equivalence weight of a substance with a COOH group.

I weighed out 0.150 grams of the substance and dissolved it in 30 mL ethanol.

I titrated with 0.0999 M NaOH and used phenolptalein as an indicator.

The color completely shifted form clear to a purple-reddish at 9.8 mL 0.0999 M NaOH added.

I know that the substance only has one COOH group.

The question is how i find the equivalence weight?

Gel filtration chromatography can also be used to determine the molecular mass of proteins. What additional information might this technique provide as compared to SDS-PAGE or ESI-MS (under standard conditions) Please Explain in depth.

Today one U.S. farmer produces enough to feed: a. 100 people b. 20 people c. 5 people d. 1000 people

How would the 3p orbitals split in an octahedral field? Briefly justify your answer.