91Ó°ÊÓ

It is known that the molecular mass of ethanol will be \({\rm{12 }} \times {\rm{ 2 + 6 }} \times {\rm{ 1 + 16 = 46 g/mol}}\)

Now, 46g of ethanol consists of\(6.022{\rm{ }} \times {\rm{ 1}}{{\rm{0}}^{23}}\) atoms. In ethanol, there is only one mole of oxygen; therefore, in 46g of ethanol, the total number of moles will become:

\({\rm{Number of Moles = 6}}{\rm{.022 }} \times {\rm{ 1}}{{\rm{0}}^{23}}{\rm{ }} \times {\rm{ 1 = 6}}{\rm{.022 }} \times {\rm{ 1}}{{\rm{0}}^{23}}{\rm{ moles}}\)

It is known that the molecular mass of formic acid (\({\rm{HCOOH}}\)) will be \({\rm{2 }} \times {\rm{ 1 + 12 }} \times {\rm{ 1 + 16 }} \times {\rm{ 2 = 46 g/mol}}\)

Now, 46g of formic acid consists of \(6.022{\rm{ }} \times {\rm{ 1}}{{\rm{0}}^{23}}\) atoms. In formic acid, there are two moles of oxygen; therefore, in 46g of formic acid, the total number of moles will become:

\({\rm{Number of Moles = 6}}{\rm{.022 }} \times {\rm{ 1}}{{\rm{0}}^{23}}{\rm{ }} \times {\rm{ 2 = 12}}{\rm{.044 }} \times {\rm{ 1}}{{\rm{0}}^{23}}{\rm{ moles}}\)

It is known that the molecular mass of water (\({{\rm{H}}_2}{\rm{O}}\))will be \({\rm{2 }} \times {\rm{ 1 + 16 }} \times {\rm{ 1 = 18 g/mol}}\)

Now, 18g of water consists of \(6.022{\rm{ }} \times {\rm{ 1}}{{\rm{0}}^{23}}\) atoms. In water, there is only 1mole of oxygen; therefore, in 18g of water, the total number of moles will become:

\({\rm{Number of Moles = 6}}{\rm{.022 }} \times {\rm{ 1}}{{\rm{0}}^{23}}{\rm{ }} \times {\rm{ 1 = 6}}{\rm{.022 }} \times {\rm{ 1}}{{\rm{0}}^{23}}{\rm{ moles}}\)