In the Synthesis of Diphenylacetylne from Stilbene what was the purpose of the solvent ethylene glycol in the second step (enough triethylene glycol was added to dibromide to make a 6 M soln)? Why couldn't we use something traditional like hexanes or ether?

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

Inadequate stores control is not an obstacle to effective work order system. (clo4) a)-true b)-false