One gm metal M3+ was discharged by the passage of 1.81 x 1023 electrons. what is the atomic weight of metal?

When 1 mole of e- passed, wt. of substance deposited=1×6.023×10231.81×1023⇒3.34g=eq.wt∴atomic wt. of metal =3.34 x 3 = 10.03 g