Abomb calorimeter has a heat capacity of 2.47 kj/k. when a 0.120-g sample of ethylene (c2h4) was burned in this calorimeter, the temperature increased by 2.44 k. calculate the enthalpy change per mole of ethylene combusted.

Evaluate this exponential expression,8. (2 + 3)2 – 42

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.

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins