Is it possible to use spectroscopic techniques to confirm both 4 He and 3 He in a sample of helium? Think about a singly - ionized atom He and select an electronic transition of this hydronic atom that is seen in the visible range). Compute the resolution (absolute and relative) that instrumentation has to provide to distinguish the two isotopes and to allow quantitative (!) determination of content.

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Potentially Useful Information Spectrochemical Series: | < Br < SCN¯ < Cl° < NO3¯ < F° < OH° < C2O4²¯ ~ H2O < NCS° < NH3 < en < PPH3 く A student has three test tubes containing a metal (M) nitrate solution M(NO3)2 (aq) (where "M" represents a generic transition metal). The student adds aqueous ammonia (NH3) to one test tube, aqueous hydrochloric acid (HCI) to the second tube, and nothing more to the third tube, but forgets to label the tubes. After this, one test tube contains a red solution, one an orange solution, and one a yellow solution. Note: This metal, M, would follow the same rules that we used for Cu(II), Ni(II), and Co(II). The Jahn-Teller Effect does not apply. Complete each statement or answer each question below about the solutions in the three test tubes. The aqua complex causes less splitting of the d orbitals of the metal than the... ammonia complex. O chloro complex.

2. ] You make 150.0 mL of a copper(II) sulfate solution but forget to cover it before leaving for the day. The next class, you measure the volume and find that you only have 132.0 mL remaining. You didn’t record the initial concentration, but you measure the absorbance of the remaining solution at 620 nm and find that it is 0.386. You also construct the following calibration curve for CuSO4: Standard solution Abs620 0.50 M 0.424 0.40 M 0.336 0.30 M 0.247 0.20 M 0.159 (refer to image) a. What is the value for k (in Beer’s Law)? Provide a calculation or graph to support your answer. b. What is the concentration of the (remaining) solution? c. What was the concentration of the original solution from the first class? d. If you removed 7.5 mL from the 132.0 mL solution in the process of measuring the absorbance, how much water should you add to obtain the original concentration that you solved for in part (c)?

Be sure to answer all parts. Covalent bonds in a molecule abso rb radiation in the IR region and vibrate at characteristic frequencies. (a) A molecular vibration absorbs radiation of wavelength 176 µm. What frequency (in s) corresponds to that wavelength? Enter your answer in scientific notatio n. X 10 -1 (b) A molecular vibration has a frequency of vibration of 6.753 x 10 m) corresponds to that frequency? 13 Hz. What wavelength (in p IIO $4 %23 2 4 3. 7. e p

IAH and IGH are not the answer.

Assume for the following situations that Beer’s law remains linear. For (a) and (b), indicate whether the extinction coefficient ε, path length b, or concentration C is changing, and how it will change the absorbance of the solution. (a) A sample is moved from a test tube that is 1.0cm wide to a test tube that is 1.5cm wide. (b)  A sample is diluted by adding enough solvent to double its volume. (c)  A solution of iron (III) chloride appears brown when in high enough concentrations. In a 1.0 cm cuvet, the absorbance of 334 nm light by a 5.4 × 10−4 M solution of FeCl3 is measured to be 1.05. What is the extinction coefficient of the FeCl3 complex at this wavelength? (d)  A sample containing an unknown concentration of FeCl3 is measured to have an ab- sorbance of 0.43 at 334 nm in a 1.0 cm cuvet. What is the molar concentration of the solution?

How is isotope dilution mass spectrometry used in quantitative analysis?

If the plant poduces 1.6*10- kg(1600 metric ton) of Cl2 daily, estimate the quanties of H2 produced  2NaCl(aq) + 2H2O(l)--> 2NaOH(aq) + H2 (g) + Cl2 (g)

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