To solve number 18 you have to add the positive and negative to equal zero. For example for 18a it would be K2S ( the 2 is a subscript ) because you need 2 positives to cancel out the 2 negatives.
Let the unknow oxidation number b x
1+x+3(-2)=0
x-5=0
x=5
Answer:
I think the answer is: one element and one compound
Explanation:
I'm really sorry if it's wrong.
Answer:
Its true.
Explanation:
Because if we are in bus we are not moving ,the bus is moving . And the things around which are in rest feels that we are moving. So comparative to them we are moving. But comparison to bus we are in rest because bus is moving and we are sitting inside bus .