When there are alcohol, amine and alkene , which two are going to be the substituents ?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3 -> a2cr(no3)3 + a3ag2so4

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.