Draw c4h8br2 that has the following 1h nmr spectrum: 1.97 (s, 3h), 3.89 (s, 1h). hint: draw c4h10 (there are two isomers), and then replace two h atoms with br atoms.

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?