<span>hydrothermal vents can be one the energy soruces for them</span>
Yes this is true as in cold conditions our body doesn't feel the urge of water therefore we may become dehydrated not even knowing about it and of course in hot coditions we sweat therefore we loose water.
Hope this helps :).
Answer:
Degree of hardness is defined as the number of parts of calcium carbonate or equivalent to various calcium and magnesium salts present in a million parts of water by mass.
Explanation:
General guidelines for classification of waters are: 0 to 60 mg/L (milligrams per liter) as calcium carbonate is classified as soft; 61 to 120 mg/L as moderately hard; 121 to 180 mg/L as hard; and more than 180 mg/L as very hard. Lime scale buildup inside a water pipe
<em>Units:</em> mg/l , ppm , kg/
, ppb , g/L
1 NaCl + 1 HCl ➡️ 1 NaCl + Water (H2O) .
A) Selenium - is apart of Sulfur family