Give examples of five polymers that are manufactured using technological processes

A2.5% (by mass) solution concentration signifies that there is a 2.5 % (by mass) solution concentration signifies that there is blank of solute in every 100 g of solution. of solute in every 100 g of solution

Which of the following is in the lanthanide family? a) uranium b) promethium c) silver d) gold

Me soon im confused much mass would a mole of hydrogen molecules contain? recall that hydrogen is diatomic. g/mol