question_answer 18)

In three moles of ethane \[({{C}_{2}}{{H}_{6}}),\] calculate the fallowing: (i) No. of moles of carbon atoms (ii) No. of moles of hydrogen atoms (iii) No. of molecules of ethane  

Answer:

(i) \[\because \] 1 mole \[{{C}_{2}}{{H}_{6}}\] contains 2 mole carbon atoms \[\therefore \] 3 mole \[{{C}_{2}}{{H}_{6}}\] will contain 6 mole carbon atoms (ii) \[\because \]1 mole \[{{C}_{2}}{{H}_{6}}\]contains 6 moles of hydrogen atoms \[\therefore \] 3 mole \[{{C}_{2}}{{H}_{6}}\]will contain 18 moles of hydrogen atoms (iii) 3 mole of \[{{C}_{2}}{{H}_{6}}\] will contain \[3\text{ }\times \text{ }6.023\text{ }\times \text{ }{{10}^{23}}\] molecules