A) co2 is non polar while h2o is polar why?
b) why pcl5 is very reactive?
c) h2o is a liquid h2s is a gas. why?

it is a 3 mark question so (a) carries 1 mark, (b)carries 1 and (c)carries 1 mark
following this method and post the question

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes

What are the primary responsibilities of a chemical engineer involved in "r& d"? develop large scale manufacturing operations discover new products and processes training of new chemists determine products needed by consumers