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Q4: Consider a sample of helium gas
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Q72: A student gave a molecule the following
Q133: Of the following elements,which needs three electrons
Q144: The molecular structure of OF<sub>2</sub> is<br>A)pyramidal<br>B)none of
Q145: Name the following: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6423/.jpg" alt="Name the