Question

Find out the atomic mass of the element where 3.011*10^22 atoms of the element weight 1.15gm

Answer 1

Convert no of atoms to moles
moles = No of atoms/Avagadro's number
moles = (3.011*10^22)/(6.022*10^23)
moles = 0.05

moles = given mass/atomic mass
0.05 = 1.15/atomic mass

atomic mass = 1.15/0.05 = 23
Element weight = 23
Element is Sodium

Answer 2

Sodium is the element....

Here goes the answer