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Chapter 2: Problem 44
Write the molecular formula of ethanol. The color codes are: black (carbon), red (oxygen), and gray (hydrogen).
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Predict the formula and name of a binary compound formed from these elements: (a) \(\mathrm{Na}\) and \(\mathrm{H},\) (b) \(\mathrm{B}\) and \(\mathrm{O},(\mathrm{c}) \mathrm{Na}\) and \(\mathrm{S},(\mathrm{d}) \mathrm{Al}\) and \(\mathrm{F}\) (e) \(\mathrm{F}\) and \(\mathrm{O},\) (f) \(\mathrm{Sr}\) and \(\mathrm{Cl}\).
Roughly speaking, the radius of an atom is about 10,000 times greater than that of its nucleus. If an atom were magnified so that the radius of its nucleus became \(10 \mathrm{~cm},\) what would be the radius of the atom in miles? \((1 \mathrm{mi}=1609 \mathrm{~m} .)\)
A sample of a radioactive element is found to be losing mass gradually. Explain what is happening to the sample.
Give an example of a case in which two molecules have different molecular formulas but the same empirical formula.
What does a chemical formula represent? What is the ratio of the atoms in the following molecular formulas? (a) NO, (b) \(\mathrm{NCl}_{3}\) (c) \(\mathrm{N}_{2} \mathrm{O}_{4},\) (d) \(\mathrm{P}_{4} \mathrm{O}_{6}\)
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