From the lists of available reagents select the one(s) you would use to in a preparation of acetophenone (phenyl methyl ketone) from bromobenzene. (In no case are more than three steps necessary.) Reagents Available
a. CH3COCI, AlC13
b. (CH3)2CuLi
c. CH3CHO
d. Hg(0Ac)2 H2O than NaBH4
e. CH3MgBr, then H304
f. KMna..1-1,0
g. Mg h. NaOH, H2O
h. Dess-Marlin

Which of the following provides support and protection for many insects a) muscle b) skeleton c) spinal cord d) exoskeleton

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?