aidan, 6 months ago X has the core ingredient of Y? If you take that literally, that would mean that X contains the core ingredient of Y. In the case of KNO3, i guess is that oxygen? Then you could also say: Air has the core ingredient of saltpeter?
X has the core ingredient of Y?
If you take that literally, that would mean that X contains the core ingredient of Y.
In the case of KNO3, i guess is that oxygen?
Then you could also say: Air has the core ingredient of saltpeter?