Is this equation properly balanced? #4Fe + 3O_2 -> 2 Fe_2O_3#?

1 Answer
May 11, 2017

Answer:

Yes! (See explanation)

Explanation:

Count how many #Fe# and #O_2# you have on both left and right sides:

You are given:

#4Fe+3O_2 -> 2Fe_2O_3#

#4:Fe:4#
#6:O_2:6#

You actually have the same number of #Fe# on both sides, The same is true for #O_2# so yes this equation is properly balanced.

For added benefit consider the following equation:

#CH_4+O_2-> CO_2+2H_2O#

ASK: Is this equation balanced? Quick answer: No

ASK: So how do we know and how do we then balance it?

DO: Count the number of each atom type you have on each side of the equation:

#1:C:1#
#4:H:4#
#2:O:4#

As you can see everything is balanced except for #O# To balance O we can simply add a coefficient of #2# in front of #O_2# on the left side which would result in #4# #O# atoms:

#CH_4+color(red)(2)O_2-> CO_2+2H_2O#

#1:C:1#
#4:H:4#
#4:O:4#

Everything is now balanced.