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- A certain compound was known to have a formula which could be represented as [PdCxHyN₂ ](ClO4)2. Analysis showed that the compound contained 30.15% carbon, 5.06% hydrogen. When converted to the corresponding thiocyanate, [PdC₂H₂N₂ ](SCN)₂, the analysis was 40.46% carbon and 5.94% hydrogen. Calculate the value of x, y, and z.What is Cmagnesium in J/g-K?The heat of formation at 25°C of liquid acetone, CH,C(0)CH,(1) is -247.5 kJ/mol. Which of the following is the correct heat of formation reaction for CH,C(O)CH,() )?
- The properties of a molecule that are most frequently calculated are geometry, energy (compared to that of other isomers), and spectra. Why is it more of a challenge to calculate “simple” properties like melting point and density? Hint: is there a difference between a molecule X and the substance X?Mesityl oxide( (CH3)2C=CHCOCH3) shows two bands at 230 nm (12600) and 327 nm (98). But its isomer, ( CH2=C(CH)3-CH2COCH3) does not show any bands above 210 nm. Explain.Among TiCl4, VCl3 and FeCl2- which one will be drawn more strongly into a magnetic field and why?
- MW is 98 1HNMR: 1.7 quintet, 1.8 quintet, 2.3 triplet What molecule is this?Discuss the concept and importance of 1H-1H Correlation Spectroscopy (COSY) in structure elucidation.6. A sample of an alum was analysed by atomic spectroscopy and gravimetrically to determine its structure. A 0.1000 g of the sample when treated with BaCl₂ produced 0.0984 g of a white solid after drying to constant weight. Another 0.1000 g sample of the alum when heated at 105°C for several hours produced a weight loss of 0.04558 g while the % of K in the sample was determined by atomic spectroscopy to be 8.240%. Use these results to work out a formula for the alum. [M,/ g mole¹: K 39.10; Al 26.98; BaSO, 233.39; SO² 96.06; H₂O 18.0148]
- SF POCck Cloa) 21314 which violate the atet rule Tosh upC8H8O produces an IR spectrum with 3063, 1686, 1646 cm signals. HNMR is a singlet at 2.6ppm (3H), and multiplet at 7.5 (5H). What is the productWhich of the following is true about fluorescence intensity of the molecule? I Fluorescence is observed in planar molecules and its intensity increase with an increase in the number of aromatic rings II When zinc is added to a hydroxyl quinoline solution the fluorescence intensity increased due to the formation of a complex which increases the rigidity of the molecule. III On increasing the intensity of the incident radiation the fluorescence intensity increases IV On increasing the concentration of the fluorigenic molecule, the fluorescence intensity increases. A plot of intensity vs concentration exhibita linear relation indefinitely in all concentration ranges. O a. II,III,IV O b. 1,11,1II,IV O. I,II,III O d. II,I,IV O e. I,II,IV
