Question

@sweetburger
sean are you good at Stoichiometry?

Answer 1

Yea, im alright at it.

Answer 2

hallelujah

Answer 3

lol :P

Answer 4

Given the reaction, Fe2O3 + 3 CO ➡ 2 Fe + 3 CO2, if 12.0 moles of CO2 are made, then how many moles of CO were used?

12.0 moles

6.0 moles

4.0 moles

3.0 moles

Answer 5

and then how do I know?

Answer 6

So we just work backwards here. I will set it up so you can see how to do these

Answer 7

So you can basically ignore the 3/3 because it equals 1 so you are left with 12 moles of CO

Answer 8

how do they cross out if one is CO2 and one is just CO?

Answer 9

I only crossed out moles of CO2. The moles of CO was left untouched.

Answer 10

ohhh and the 3's themselve are just one. I C I C

Answer 11

yes very good.

Answer 12

what about the 2 mole of FE?

Answer 13

"what 2 moles of Fe?" No, but seriously if the question doesn't say anything about the 2 mole of Fe you can just ignore it.

Answer 14

You are specifically observing CO and CO2. Nothing Else.

Answer 15

oh ok :)

Answer 16

need help with any others?

Answer 17

it was 12.0 right?

Answer 18

yes correct :)

Answer 19

okay so the next one is wierd because it actually combines the elements... I'll tag you :)

Answer 20

alrighty