Question

if u answer correctly then I will mark u as brainliest

Answer 1

molar mass of na = 23g
given mass = 69g
no. of moles = given mass / molar mass
= 69/23
= 3 moles..

hope it helps

Answer 2

Hey mate your answer is
Mass ,m =69g
molar mass,M = 23
no.of mole = m/M =69/23 =3 moles