Question

Using these balanced reactions, 2C+O2=2Co

Fe2O3+3Co=2Fe+3Co2
how many moles of O2 are required for the production of 3.19 kg of Fe?
A) 42.8 moles
B) 19.0 moles
C) 171 moles
D) 57.1 moles
E) 2.39 moles​

Answer 1

The right answer is D, that is 57.1 moles.

Step-by-step explanation:

A mass of 3.19 kg of iron corresponds to 3.19x103 = 3190 g of iron.

The moles of iron contained in this mass are: 3190 g/55.85 g/mol= 57.1 mol.