50.0-g block is 40.0% submerged. what is the mass of the submerged portion of the block?

In all living cells dna controls cellular activities by

Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.

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.