In three moles of ethane (C2H6), calculate the following : (i) Number

1.	In three moles of ethane (C2H6), calculate the following : (i) Number of moles of carbon atoms. (ii) Number of moles of hydrogen atoms. (iii) Number of molecules of ethane.
Answer» (i) 1 mole of C₂H₆ contains 2 moles of Carbon atoms ∴ 3 moles of of C₂H₆ will contain 6 moles of Carbon atoms (ii) 1 mole of C₂H₆ contains 6 moles of Hydrogen atoms ∴ 3 moles of of C₂H₆ will contain 18 moles of Hydrogen atoms (iii) 1 mole of C₂H₆ contains Avogadro's no. 6.02x1023 molecules ∴ 3 moles of of C₂H₆ will contain ethane molecule = 3x 6.02 x 10²³= 18.06 x10²³ molecules.

In three moles of ethane (C2H6), calculate the following : (i) Number of moles of carbon atoms. (ii) Number of moles of hydrogen atoms. (iii) Number of molecules of ethane.

Answer»

(i) 1 mole of C₂H₆ contains 2 moles of Carbon atoms

∴ 3 moles of of C₂H₆ will contain 6 moles of Carbon atoms

(ii) 1 mole of C₂H₆ contains 6 moles of Hydrogen atoms

∴ 3 moles of of C₂H₆ will contain 18 moles of Hydrogen atoms

(iii) 1 mole of C₂H₆ contains Avogadro's no. 6.02x1023 molecules

∴ 3 moles of of C₂H₆ will contain ethane molecule

= 3x 6.02 x 10²³= 18.06 x10²³ molecules.