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Novay_Z [31]
3 years ago
7

According to Moh's hardness scale, your fingernail would be rated as 2.5. Juan and Carol are trying to identify an unknown miner

al. Carol can scratch the mineral sample with her fingernail. Juan and Carol know the mineral MUST be one of these four choices. Based on the scratch test, the mineral is
Biology
2 answers:
Elan Coil [88]3 years ago
5 0
I think it's B., calcite.

Not sure though.

Hope this helps, 
-Tiara
zysi [14]3 years ago
3 0

<u>I think the answer might be B. Calcite because it says it is at 2.5, it can't be gypsum because it's at 2 and when you round 2.5 it's closer to 3 than 2. So it will be B. </u>

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The concentration gradient will be in the direction from the cell to the outside of the cell .

<h3>What is concentration gradient and how the direction is from inside to the outside ?</h3>
  1. Concentration gradient will be from inside of the cell to the outside of the cell that is from high concentration to the low concentration.
  2. The concentration of substances inside the cell if given to be more than the concentration of the substance inside the cell.
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