Help chemistry multiple choice

Alevelhelp.1

Help, I don’t get this question, my working out is in the whiteboard and the correct answer is B

(edited 1 year ago)

Reply 1

GeT_iN_SHinJI

You haven't balanced out your equation. It should be:
2X + 3/2 O2 --> X2O3
Edit: It would also be a lot easier to compare the moles of X and O2 rather than O2 and X2O3

(edited 1 year ago)

Reply 2

Alevelhelp.1

Original post by GeT_iN_SHinJI

You haven't balanced out your equation. It should be:
2X + 3/2 O2 --> X2O3

Ohhh ok thanks!!
I haven’t got time to do it again but if I did this again using the same method as the whiteboard but with the balanced eq will I get the correct ans or is my method wrong too?

Reply 3

GeT_iN_SHinJI

Original post by Alevelhelp.1

Ohhh ok thanks!!
I haven’t got time to do it again but if I did this again using the same method as the whiteboard but with the balanced eq will I get the correct ans or is my method wrong too?

Yea it probably will come up with the correct answer. I compared the moles of X and O2 instead but I think the rest of your working out is pretty much the same