91Ó°ÊÓ

In an experiment \(1.550 \mathrm{~g}\) of mercury oxide decomposed to give oxygen gas and \(1.435 \mathrm{~g}\) of liquid mercury. What is the empirical formula of mercury oxide?

A 1.115 g sample of cobalt was heated with sulfur to give \(2.025 \mathrm{~g}\) of cobalt sulfide. What is the empirical formula of cobalt sulfide?

A \(0.715 \mathrm{~g}\) sample of titanium was heated with chlorine gas to give \(2.836 \mathrm{~g}\) of titanium chloride. What is the empirical formula of titanium chloride?

The percent composition of copper chloride is \(64.1 \% \mathrm{Cu}\) and \(35.9 \%\) Cl. Calculate the empirical formula.

The percent composition of vanadium oxide is \(68.0 \% \mathrm{~V}\) and \(32.0 \%\) O. Calculate the empirical formula.

The percent composition of tin bromide is \(42.6 \% \mathrm{Sn}\) and \(57.4 \%\) Br. Calculate the empirical formula.

The percent composition of bismuth oxide is \(89.7 \% \mathrm{Bi}\) and \(10.3 \%\) O. Calculate the empirical formula.

Trichloroethylene (TCE) is a common solvent used to degrease machine parts. Calculate the empirical formula for \(\mathrm{TCE}\) if the percent composition is \(18.25 \% \mathrm{C}, 0.77 \% \mathrm{H},\) and \(80.99 \% \mathrm{Cl}\)

Dimethyl sulfoxide (DMSO) is a liniment for horses and has been used in the treatment of arthritis for humans. Calculate the empirical formula for DMSO, given that the percent composition is \(30.7 \% \mathrm{C}, 7.74 \% \mathrm{H}, 20.5 \% \mathrm{O},\) and \(41.0 \% \mathrm{~S}\).

Aspirin has a molar mass of \(180 \mathrm{~g} / \mathrm{mol}\). If the empirical formula is \(\mathrm{C}_{9} \mathrm{H}_{8} \mathrm{O}_{4}\), what is the molecular formula of aspirin?