Answer:
Extraction of oil from tar sands is not economically feasible.
Explanation:
Answer:
The only thing that can scratch Corundum is diamond.
Explanation:
We refer to the Mohs Hardness Scale for the hardness levels. We can see that Corundum is a level 9 which is the second highest so at a level 10 we see diamond, therefore diamond is the only thing that can scratch Corundum.
I would believe that the Answer is C
Its b during how ever you say that word if not that then c not all the way sure tho
It’s trueeeee kids, don’t text and drive
