Which of the substances below would have the lowest boiling point? propane, with a vapor A. pressure of 998 kPa at 293K

B. water, with a vapor pressure of 2.3 kPa at 293K

C. ethanol, with a vapor pressure of 5.83 kPa at 293 K

D. butane, with a vapor pressure of 220 kPa at 293 K

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.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

(1.6 × 10-19)(5.0 × 106) = c × 10d identify the missing numbers below to show the result of multiplying the numbers.