Consider a sample of polyethylene containing 2000 chains with molecular weights ranging from 0 to 4000 g/mol; 4000 chains with molecular weights ranging from 4000 to 8000 g/mol; 3000 chains with molecular weights ranging from 8000 to 12000 g/mol; and 1500 chains with molecular weights ranging from 12000 to 16000 g/mol. Calculate the following: a. the weight average molecular weight.
b. the number average molecular weight
c. the polydispersity
d. the degree of polymerization

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

Imagine that you’re getting ready to move to a new city. when people move, they are influenced by push factors and pull factors, and you have many reasons for your move. which of the following factors is an example of a pull factor? a. wanting to move because you’ve found a great new school somewhere new b. needing to move because there are not enough resources in your old hometown c. being forced to move because your old home is gone d. having to move because there are no jobs in your current hometown

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?