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Give Structures: Indentify unknown organic liquids
An unknown organic liquid, A, was found to burn with yellow, sooty flame and give a positive Lucas test (about 5 min). Upon treatment with sodium dichromate-sulfuric acid solution it produced Compound B, which also burned with a yellow, sooty flame. Compound B gave a positive 2,4-dinitrophenylhydrazine test, but a negative result when treated with Tollens reagent. However, B did give a positive iodoform test. The 1H NMR spectrum for Compound A showed the following:
1.4 ppm 3H (doublet)1.9 ppm 1H (singlet)4.8 ppm 1H (quartet)7.2 ppm 5H (complex multiplet)
Give the structures and suitable names for Compounds A and B.
Write down the electron configurations for C2 and F2. What is the bond order for each? Which one is likely to have larger bond dissociation energy.
Compute A current is drawn from the cell until 1.20 grams of Ag have been deposited at the Ag electrode. Determine the value of E for the cell at that stage of operation.
Compute the number of rads and rems of radiation in five years from such a level of plutonium.
26.0cm of a solution containinh 1.86g of X2CO3 in 250 reacted completely with 27.0cm of solution contain 3.65g of HCL per dm,calculate the molar mass of X2CO3 and relative atomic mass of X, and identify X.
Suppose 5.00g of Ca is added to 50.0mL of 1.00M HCL. Determine the limiting reactant in this case and number of moles of calcium actually consumed.
Determine the sign of ΔS sys and ΔS surr for each chemical reaction.2CO(g)+O 2 (g)?2CO 2 (g)ΔH ° rxn = -566.0 kJ. Choose from:
A gas sample containing N2 and O2 was found to contain 72% N2. If the pressure of the sample was 2.0 atm, what is the partial pressure of O2?
72.0 mL of a 1.40 M solution is diluted to a volume of 278 mL. A 139-mL portion of that solution is diluted using 161 mL of water. What is the final concentration.
The air in an inflated balloon (defined as the system) warms over a toaster and absorbs 121 J of heat. As it expands, it does 70. kJ of work. What is the change in internal energy for the system.
What is the boiling point of a 0.800 molal solution of sugar in water? Kb = 0.512C/m for water. Sugar does not dissociate in solution and pure water boils at 100C.
NaCl(aq) + H2O(l) → NaOH(aq) + Cl2(g) + H2(g). If the brine contains 389 g of NaCl, how much Cl2 can be produced.
what is the formula used to determine the mass of KClO3 to form a saturated solution in 250g of water at 30 degrees celcius
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