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Question: the boiling points of molecule w x y and z...

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The boiling points of molecule W, X, Y and Z are given in the table below. Each molecule has one of the following formulas: H2S, HF, CO2 and H2O.

Molecule Boiling point
W -78.5 celcius
X -60.2 celcius
Y 19.5 celcius
Z 100 celcius

 a. Name the physical state of W, X, Y and Z at room temperature (25oC). (1 mark)

b. Determine the identity of W and Z; and explain why their boiling points are so vastly different. (4 marks)

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