Calculations Involving Law of Conservation of Mass??

Question

What mass of iron can be formed from 12g of coal from the following equation?

Fe3O2 + 4C --------> 3Fe + 4CO

Answer 1

from the equation, 4 carbon to form 3 iron..

12g of carbon contain 1 mole of carbon

there for 9 mole of iron will be formed

mass = molar mass X mole

           = 9 X 26

           = 234g of iron

Answer 2

Using analytical chemistry/ stoichiometry

1. 1 mole of Carbon creates 3/4 moles of Iron.

2. 12 g of Carbon creates ___19.5 g of Iron___

3. Solution:

26 g x 3/4 =19.5 g of Iron.