Question

Which of the following is not a correct formula?

Answer 1

Ba2O
Ca3N2
KCl
LiS2

Answer 2

I think its either A or D

Answer 3

D.

Answer 4

@IMAKEITRAINMONEY

Answer 5

Li has +1 charge so LiS2 is wrong

Answer 6

so D is the correct answer...

Answer 7

@abb0t Now, why wouldn't it be A? Ba has a +2 charge and O has a -2 charge, so it should be BaO. A is also wrong. Unless I'm missing something here?

Answer 8

i think its d

Answer 9

@sorryimfrankie

Answer 10

Ba2O-->barium suboxide here ba does not take +2..

Answer 11

^^

Answer 12

Okay, I will go with D and tell you guys if I got it right or not

Answer 13

ya sure!

Answer 14

they could both be wrong.

Answer 15

if u wanna know more about suboxides.. https://en.wikipedia.org/wiki/Suboxide

Answer 16

i was thinkin a or d but im so confused now

Answer 17

I doubt they cover suboxides in high school level chemistry.

Answer 18

I got it wrong. Thats okay though, I can retake the assignment. Thank you guys for all your input though!!

Answer 19

hmm..

Answer 20

I was thinking about the rules of oxidation states.
D is incorrect as of course its oxidation numbers do not balance out, it should be Li2S

However A is also incorrect because the law of oxidation numbers state that oxygen usually has an oxidation number of -2, apart from when it is in a peroxide. A peroxide needs 2 oxygen atoms and therefore the formula should be BaO2 (oxygen having an oxidation number of -1, and Ba being +2)

I'm not sure if that's right of not, but I thought I'd share my opinion :) Did you get given the right answers or not?

Answer 21

Turns out both A and D were correct - I asked my teacher about it and she said that the test was messed up and they were working on fixing it :)