What is the gram formula mass of na2co3 x 10h2o

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.

Is of of 3- ? a. 1--3- b. 1--2- c. 1--3- d. of

Can anyone answer these questions? ? i need it before 1: 00pm today