Polyacrylonitrile is a polymer made from the monomer acrylonitrile, CH2CHCN. Polyacrylonitrile is used in making Acrilan™ fibers
used widely in rugs and upholstery fabric. If ignited,
this fiber can release a poisonous gas. In the case of
a fire, what danger might rugs and upholstery made
of this polymer present?

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying