The development of synthetic polymers, such as plastics, has made the development of a wide variety of products possible. Unfortunately, our use of large amounts of plastics has negative impacts on our environment. Describe one negative impact our use of plastics has had on the environment.   (2 marks)

It is important to handle and store organic compounds, such as ethers, carefully because:

Name the following hydrocarbons. In case you can’t see them well, that is a double bond in b) and a triple bond in c).   (3 marks)

The temperature-time graph above represents the distillation of a mixture of unknown alcohols and water. Explain how you can use a temperature-time graph of a distillation to determine what compounds are present in an unknown mixture.  (3 marks)

Elements produce an emission spectrum when:

In a single displacement reaction to determine if magnesium, Mg, would replace calcium, Ca, in calcium chloride, CaCl2, you would:

Bohr’s model of the atom was the first model that:

Dx:  Post left TKA 2 weeks ago O: Left knee extension MMT 3-/5 PT Goal: Increase strength left quads PT Plan of Care:  NMES Based on the patient’s MMT score, which of the following exercises performed, in addition to NMES, is appropriate to help meet the PT’s goal? 

To increase charge density the PTA

A patient is learning to use an electrical stimulation unit designed for use in the home.  During the instruction session the patient feels a sharp burning sensation at the edge of the electrode.  The PTA instructs the patient to check all of the following EXCEPT: