The following data are for a liquid chromatographic column: column width 24.7 cm volume of the mobile phase, Vm 1.37 mL volume of the stationery phase, Vs 0.164 mL A chromatogram of a mixture of species A, B, C and D provided the following data: Calculate the retention factor for for species D. Retention Time, min Width of Peak Base (W), min Non Retained 3.1 - A 5.4 0.41 B 13.3 1.07 C 14.1 1.16 D 21.6 1.72

Why do you suppose the structural polysaccharide cellulose does not contain branches? why do you suppose the structural polysaccharide cellulose does not contain branches? branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby decreasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby increasing the rigidity and strength of the microfibrils. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby increasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby decreasing the rigidity and strength of the microfibrils.

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Can someone me with questions 12 and 13 plz.