Question

Why Ethan, with the molecular formula c2h6 has 7 covelent bond

Answer 1

Dekho sabse pehle dono carbon ke liye do C likho, fir hydrogen ka H bhi likh do, jab aap bond banaege tab 6 bonds C-H ka banega aur 1 bond C-C ka banega.

Agar aap bond nhi banaege ya 7 se jyada banaege toh carbon ki valency fulfill nhi hogi.

Hope it helps.

For more explanation do comment.

Answer 2

Because there are two carbon atom and six hydrogen atom.

Also due to Hydrogen have only one electron, to become stable it share electron formin covalent bond.