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Molecules quick check

A quick check of 3 questions. After you submit, each question shows the right answer and why.

3 of 8 questions, Advanced level. Aimed at the Advanced level, your current depth. Questions you have not answered yet come first.

Show all 8 questions

ScientistQuestion 1 of 3

Using abridged atomic weights C = 12.011 and O = 15.999, calculate the molar mass of carbon dioxide, CO₂, in g/mol (to three decimal places).

ScientistQuestion 2 of 3

Water has four electron groups around oxygen, like methane has around carbon. Why is water's H–O–H angle (about 104.5°) smaller than the ideal tetrahedral 109.5°?

AdvancedQuestion 3 of 3

Use VSEPR reasoning to explain why CO₂ is linear but H₂O is bent.