please solve this question

dear student,
The molar mass of Fe(OH)n will be 55.84 + n x (17.008)
As Compound with molar mass 55.85 + n x (17.008) has a mass of 1.0101g. 
Using the formula Mass = Molar Mass x  No. of moles, 

1.0101 = (55.85+n x (17.008)) x 0.028352 / n
1.0101 = 1.5835 / n + 0.48221
0.52789 = 1.5835 / n
n = 1.5835 / 0.52789
   = 2.9997 = 3
Regards,