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All 8 questions. After you submit, each question shows the right answer and why. Back to the quick check
A water molecule is shaped like a straight line.
A water molecule is H₂O. How many hydrogen atoms does one water molecule have?
Solid table salt is made of separate NaCl molecules.
Acetic acid has the molecular formula C₂H₄O₂. What is its empirical formula?
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).
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°?
Use VSEPR reasoning to explain why CO₂ is linear but H₂O is bent.
How many water molecules are in 9.0075 g of water, taking M(H₂O) = 18.015 g/mol and the Avogadro constant as 6.022 140 76 × 10²³ mol⁻¹? Give the answer in units of 10²³ to three significant figures.
