Question

what is the mass in grams of 1*10^23 atoms of Na

Answer 1

no of atoms = (Given mass/Molar Mass) * avagardo's no
Let Given mass be x
So,
10^23 = x/23 * 6.022 * 10^23
x = 23 * 10^23/6.022 10^23
Therefore,
x = 3.819 gm