How many moles are 4.20 x 1025 atoms of Ca?

For the following dehydrohalogenation (e2) reaction, draw the zaitsev product(s) resulting from elimination involving c3–c4 (i.e., the carbon atoms depicted with stereobonds). show the product stereochemistry clearly. if there is more than one organic product, both products may be drawn in the same box. ignore elimination involving c3 or c4 and any carbon atom other than c4 or c3.

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

The equation picture below shows which type of nuclear reaction u 235 + n x e 134 + sr 100 + 2n