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Natalie Pemberton-Parris 00027917

2nd October 2014CHEM 121 Introduction Worksheet

1. Answer the following questions about figure 1 below.

Figure 1

a) How many molecules are present in the diagram? 5 b) Are the molecules polar or non-polar? Polarc) If the molecules are polar, write in the charges on each of the atoms of each molecule on the diagram.

d) State the type of intermolecular force of attraction that would exist between the molecules.Hydrogen bondinge) By using dots, show where this force of attraction would occur between the molecules on the diagram.

2. Answer the following questions about figure 2 below:

Figure 2a. Are the molecules polar or non-polar?Non-Polarb. What type of intermolecular force of attraction would occur between the molecules?Vander waal Forces3. Answer the following questions about figure 3 below:

Figure 3

a. What type of intermolecular force of attraction would take place between the two molecules above?Electrostatic Interactionsb. State the reason for your answer.Because on the phosphate group there are negatively charged oxygen and on the ammonium ion there are positively charged hydrogen bonds and as a result the oppositely charge ions the groups will bond together.