The cooling pack which treat a sports injury is kneaded with water and

1.	The cooling pack which treat a sports injury is kneaded with water and
A.	Ammonium chloride crystals
B.	calcium chloride crystals
C.	Ammonium dioxide crystals
D.	nitrogen
Answer» B. calcium chloride crystals

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The cooling pack which treat a sports injury is kneaded with water and

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