most plastic bags are made of polyethylene. polyethylene is a kind of polymer, a substance made of hundreds…
most plastic bags are made of polyethylene. polyethylene is a kind of polymer, a substance made of hundreds of repeating units called monomers. the prefix poly - in polyethylene means many. so polyethylene is made of many units of ethylene. which model shows polyethylene?
Answer
Explanation:
Step1: Recall polymer - monomer concept
A polymer is made of repeating monomer units. Polyethylene is made of ethylene monomers.
Step2: Analyze ethylene structure
Ethylene has the formula $C_2H_4$ with a double - bond between the two carbon atoms. But polyethylene is a long - chain polymer formed by the addition polymerization of ethylene. Each carbon in the polyethylene chain is bonded to four other atoms (either carbon or hydrogen).
Step3: Examine the models
The first model shows a long chain of carbon atoms with hydrogen atoms attached, which represents a polymer made of repeating units. The second model shows a single ethylene molecule with a double - bond between the carbon atoms.
Answer:
The first model (the long - chain model)