What is the isoelectric point, pl, for the pentapeptide, MGHFD 4.8 3.1 Show work O 7.8 2.3 O 9.5

hat is meant by the term driving forces? Why are mailer spread and energy spread considered to be driving forces?

1. Calculate the Coulombic (ionic) interaction energy between atoms for the C=O ∙∙∙H-N hydrogen bond in a peptide at a distance of 1.5Å in units of kJ/mol. Assume that the partial charge on O is −0.434, the partial charge on H is +0.417 and the permittivity of the protein environment is 6.  2. The dipole moment of an individual peptide group is approximately 3.46 D. Assuming that the dipoles line up linearly estimate the energy of interaction (in kJ.mol) of the hydrogen bond in Q1 using a dipole-dipole model.

10:56 1 Question 5 of 20 Submit Which of the following reactions would have the most positive AS° value? A) SO2(g) + Na,0(s) – Na,SO3(s) B) CO2(s) CO2(g) C) Fe³*(aq) + SCN (aq) – FESCN²*(aq) D) N2(g) + 3 H2(g) 2 NH3(g) E) 2 NO(g) + Cl2(g) – 2 NOCI(g)

A1 The intermetallic compound FeTi has the CsCl-type structure with a=0.308nm. Calculate its density

How many electrons are involved in the semireation below:

Calculate AH for the following reaction, FeO(s) + CO(g) -----> Fe(s) + CO2(g), from the following data, Fe2O3(s) + 3CO(g) -----> 2Fe(s) + 3CO2(g) 3Fe2O3(s) + CO(g) > 2FE3O4(s) + CO2(g) Fe;O4(s) + CO(g) AH = -23 KJ AH = -39 KJ --- -- -----> 3FeO(s) + CO2(g) AH =+18 KJ %3D

Determine the gravimetric factor of CrO4 in K₂Cr2O7. The atomic weight of chromium is 52g/mol 0.7891 0.3946 0.8791 0.4936 о

In XCI, which crystallizes in CsCI structure, the sum of the anionic and cationic radii is found to be 333 pm. The density of the compound is 3.533 g cm. Calculate the mass of the cation as g mol". Do not write units, only enter numerical values. Use two digits at most for decimal numbers, use dot (.) as decimal separator (i.e. two-point-fifty-one should be entered as 2.51). Do not use comma () as decimal separator.

4. LaCoO3 is a very unusual magnetic material that exhibits different types of magnetism in different temperature ranges. It has been shown to be (a) paramagnetic, (b) ferromagnetic, and (c) diamagnetic depending on the temperature. Sketch the M vs. H behavior that would be expected for each below. Be sure to label your axes. (a) (b) (c)