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10 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.
i) 1 mole of C2H6 contains 2 moles of carbon atoms.
Number of moles of carbon atoms in 3 moles of C2H6
= 2 × 3 = 6
(ii) 1 mole of C2H6 contains 6 moles of hydrogen atoms.
= 3 × 6 = 18
(iii) 1 mole of C2H6 contains 6.023 × 1023 molecules of ethane.
Number of molecules in 3 moles of C2H6
= 3 × 6.023 × 1023 = 18.069 × 1023
1)c2h6 contain 2 carbon atom so in three moles of ethane it will contain 3*2=6
2)c2h6 contain 6 carbon aton so in three moles of ethane it will contain 6*3=18
3)1 mole contain 6.022*1023 so 3 mole will contain 6.022*1023*3=18.069*1023
Tough question !
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