Question

How does NH3 act as a Lewis base​

Answer 1

due to presence of lone pair of electron its anek to donate its electron to an electron loving specieshence its act as an electron donating group or Lewis base

Answer 2

$\huge\boxed{\underline{\mathcal{\red{A}\green{N}\pink{S}\orange{W}\blue{E}\purple{R}}}}$

• ❤.. Nitrogen atom in ${NH3}$ has one lone paur of electron which is available for donation.
• ❤.. Therefore, it acts as a Lewis base.