What gives carbon the ability to form chains that are almost unlimited in length?

There is a liquid capsule inside a cup full of liquid. the cup full of liquid has salt in it and the liquid capsule has no salt in it. in which direction will the solvent flow? a. the salt does not have to move b. from the capsule to the larger cup c. equally between the capsule and the cup d. from the larger cup to the capsule

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen

Idon’t understand and i need the answer! you