Identify this type of reaction: 2 C5H5 + Fe --> Fe(C5H5)2 double replacement, decomposition, single replacement, or synthesis. Which one?

In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

Which element would mostly likely have an electron affinity measuring closest to zero