Polyethylene industrial process used to maximise purity’s and yield

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

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it