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Chapter 3: Problem 123
The oxidation state of I in the ion \(\mathrm{H}_{4} \mathrm{IO}_{6}^{-}\) is (a) -1 (b) \(+1 ;(c)+7 ;(d)+8\)
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To deposit exactly one mole of \(\mathrm{Ag}\) from an aqueous solution containing \(\mathrm{Ag}^{+}\) requires a quantity of electricity known as one faraday (F). The electrodeposition requires that each \(\mathrm{Ag}^{+}\) ion gain one electron to become an Ag atom. Use appropriate physical constants listed on the inside back cover to obtain a precise value of the Avogadro constant, \(N_{A}\).
Which answer is correct? One mole of liquid bromine, \(\mathrm{Br}_{2},\) (a) has a mass of \(79.9 \mathrm{g} ;\) (b) contains \(6.022 \times 10^{23}\) Br atoms; (c) contains the same number of atoms as in \(12.01 \mathrm{g} \mathrm{H}_{2} \mathrm{O} ;\) (d) has twice the mass of 0.500 mole of gaseous \(\mathrm{Cl}_{2}\)
The formula for calcium chlorite is (a) \(\mathrm{CaClO}_{2}\) (b) \(\mathrm{Ca}\left(\mathrm{ClO}_{2}\right)_{2} ;(\mathrm{c}) \mathrm{CaClO}_{3} ;(\mathrm{d}) \mathrm{Ca}\left(\mathrm{ClO}_{4}\right)_{2}\)
Adenine, a component of nucleic acids, has the mass percent composition: \(44.45 \%\) C \(, 3.73 \%\) H, \(51.82 \%\) N. Its molecular mass is 135.14 u. What is its molecular formula?
Diethylene glycol, used to deice aircraft, is a carbonhydrogen-oxygen compound with \(45.27 \%\) C and \(9.50 \%\) H by mass. What is its empirical formula?
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