Question

Four times of Avogadro's number of molecules of CH4 are decomposed to form carbon and hydrogen find moles and mass of ethane.​

Answer 1

Explanation:

(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.

Number of moles of carbon atoms in 3 moles of C2H6

= 3 × 6 =18

(iii) 1 mole of C2H6 contains 6.023 x 1023 molecules of

ethane.

Number of molecules in 3 moles of C2H6

= 3 × 6.023 × 1023 = 18.069 × 1023