Question

Determine the number of moles in 100g Fe(OH)3 and 50g Ba(NO3) 2.​

Answer 1

Answer:

Given mass of Fe(OH)3 =100g

Molar mass of Fe(OH)3 = 55 + 16x3 + 1 x3

= 55+48+3

= 106 g / mol

Mole = given mass /molar mass

= 100 / 106

= 50/53 moles

2. given mass of Ba(NO3)2 = 50g

molar mass of Ba (NO3)2 = 137 +14x2 +48x2 = 137+28+96

= 261 g/mol

mole = 50 /261 mol

I hope it's a right answer.