How much energy is required to vaporize 86. 60 g of ethanol (c2h5oh 46. 07 g mol−1) at its boiling point, if its δhvap is 38. 50 kj/mol? (four sigfigs) kj.

Set up a hope this ! : )

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.

Ithink the answer is d.