Xylene is a derivative of benzene. One isomer is 1,4-dimethylbenzene. H3C CH3 (a) State the number of 1H NMR signals for this isomer of xylene and the ratio in which they appear.

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean

An atom's configuration based on its number of electrons ends at 3p4. another atom has seven more electrons. starting at 3p, what is the remaining configuration? 3p63d34s2 3p43d54s2 3p64s23d3 3p44s23d

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?