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Question 1) - Calculate the total number of conformations generated in a drug molecule with single rotatable bond and 2.4° increment of torsion angle?
Question 2) - Lamivudine is a drug used for the treatment of HIV (AIDS). This drug stop HIV from infecting cells in the body. Only the (-)-enantiomer of lamivudine is registered for the treatment of HIV because it is more active and less toxic than either the (+)-enantiomer or the racemate. In the (-)-enantiomer, the chiral centre at position 2 has the R configuration and the chiral centre at position 5 has the S configuration. Draw the structure of (-)-lamivudine using hashed and wedged line notions that represents R configuration at 2 and S configuration at 5. Need to show your work-up. NH2 N N O O S OH
what is Jones oxidation and write the mechanism of Jones oxidation?
A. Cr2O7 -2 + 2OH- → 2Cr2O4 -2 + H2O
Redox or Nonredox?
If REDOX:
Balanced equation:
Oxidizing agent:
Reducing agent:
conjugate acid of PO3−4
conjugate acid of NH3
Convert the following concentrations of aqueous solutions.
1.00m K2SO4(aq) %(w/w) FW (K2SO4)=174.26 g/mol
conjugate base of H2CO3
conjugate base of HSO-4
conjugate base of NH+4
What is the pH of an aqueous solution with a hydrogen ion concentration of [H+]=5.2×10−9 M?
For the reaction, H2O(l)⟶H2O(g), calculate ΔG at a) 20ºC, b) 100ºC and c) 150ºC.
Calculate the standard-free energy changes for the reaction 2MgO(s) + 2Mg(s) + O2(g) at 25ºC .
With solution
Determine the equivalent of one mole of the following substances, given type of reaction they participate in.
1. NaOH Acid-Base Reaction to form NaCl
2. HNO3 Acid-Base reaction to form NaNO3
3. H2SO4 Acid-Base reaction to form Na2SO4
4. Sr(OH)2 Acid-Base reaction to form SrCl2
5. H3PO4 Acid-Base reaction to form Na3PO4
6. CaCl2 precipitation reaction to form CaCO3
7. H3PO4 precipitation reaction to form Mg3(PO2)2
8. AgNO3 precipitation reaction to form Agl
9. Ba(C2H3O2)2 precipitation reaction to form BaSO4
10. AlBr3 precipitation reaction to form Al(OH)3
11. FeCl3 redox reaction to form FeCl3
12. Br2 redox reaction to form KBr
13. Zn redox reaction to form ZnSO4
14. HCl redox reaction to form H2
15. Cu redox reaction to form CuO
What is the concentration of the solutions of the following:
1. 1mol and 1kg
2. 1mol and 1L
3. 5mol and 100g
4. 4mol and 25mL
5. 20mol and 9L
6. 34mol and 1000kg
7. 9mmol and 100mL
8. 4.3 umol and 600g
9. 4mmol and 15mg
10. 11nmol and 20g
