91Ó°ÊÓ

A \(2.770-\mathrm{g}\) sample containing only carbon, hydrogen, and oxygen burns in excess \(\mathrm{O}_{2}\) to produce \(4.06 \mathrm{~g} \mathrm{CO}_{2}\) and \(1.66 \mathrm{~g} \mathrm{H}_{2} \mathrm{O} .\) Calculate the mass of each element in the sample and the mass percentage of each element in the compound.

A \(3.11-\mathrm{g}\) sample containing only carbon, hydrogen, and nitrogen burns in excess \(\mathrm{O}_{2}\) to produce \(5.06 \mathrm{~g} \mathrm{CO}_{2}\) and \(2.07 \mathrm{~g} \mathrm{H}_{2} \mathrm{O} .\) Calculate the mass of each element in the sample and the mass percentage of each element in the compound.

A \(0.513-\mathrm{g}\) sample containing only carbon, hydrogen, and nitrogen burns in excess \(\mathrm{O}_{2}\) to produce \(1.04 \mathrm{~g} \mathrm{CO}_{2}\) and \(0.704 \mathrm{~g} \mathrm{H}_{2} \mathrm{O} .\) Calculate the mass of each element in the sample and the mass percentage of each element in the compound.

What is the empirical formula of a compound that contains \(0.139 \mathrm{~g}\) hydrogen and \(0.831 \mathrm{~g}\) carbon?

What is the empirical formula of a substance that contains \(0.80 \mathrm{~g}\) carbon and \(0.20 \mathrm{~g}\) hydrogen?

A sample contains \(0.571 \mathrm{~g}\) carbon, \(0.072 \mathrm{~g}\) hydrogen, and \(0.333 \mathrm{~g}\) nitrogen. What is the empirical formula of this substance?

A sample contains \(0.152 \mathrm{~g}\) nitrogen and \(0.348 \mathrm{~g}\) oxygen. What is the empirical formula of this substance?

What is the empirical formula of a substance that contains only iron and chlorine, and is \(44.06 \%\) by mass iron?

What is the empirical formula of a substance containing only selenium and chlorine, and is \(52.7 \%\) selenium by mass?

A \(1.000-\mathrm{g}\) sample of a compound contains \(0.252 \mathrm{~g}\) titanium and \(0.748 \mathrm{~g}\) chlorine. Determine the empirical formula of this compound.