6. which is a characteristic of a mixture?

You didn't give any options so here i go.

a mixture is something that has been mixed or added together, but that does not mean it turns into one substance. For instance, if you see a salad dressing where the oils rose to the top and the herbs fell to the bottom, that is still a mixture. Mixtures can separate but that doesn't mean it's not a mixture anymore.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

the correct answer would be d. hope this !