The following chemical equation shows the incomplete formula for burning methanol. The question mark represents the unknown number of oxygen (O2) molecules. How many molecules of O2 are needed to balance this chemical equation?

Question

2CH₃OH + ?O₂ > 2CO₂ + 4H₂O

A. 1
B. 3
C. 5
D. 6

Please Help!!

Answer 1

Count it up. Don't make a hard problem out of it.
Look on the right. How many O atoms do you see? I see 4 from 2CO2 and 4 from 4H2O or 8 total. You have on the left 2 from the 2CH3OH so you need 6 more. How can you get that? You must have ? of O2.

Answer 2

Thank you

Answer 3

but which one is it

Answer 4

Is it six