Consider the following properties:
i) objects made of silver become tarnished.
ii) the boiling point of ethanol is 78◦c.
iii) the red color of rubies is due to the
presence of chromium ions.
which is/are chemical?

What do you mean by that? like the contents? the thc level?

Answer; carbon monoxide (co);

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).