Answer: <span>C, They add to its hardness.
</span>Calcium is naturally dissolved in water, it can be
found in water as Ca2+ ions and causes <span><span><span>water hardness.</span> C</span>omes from rocks
such as limestone, marble, calcite, dolomite, gypsum, fluorite and
apatite. It can also be a ph stabilizer.
</span>
Water from nearby rivers or lakes is usually use to cool down the reactors in nuclear power plants the release of this heated water back into the river or lake would most likely result in a change in the variety of life in the waters. It would change since life in that area should adapt to the change in the temperature due to the nuclear reactor.
Answer: I don’t know
Explanation:
Is there a specific question?
Umm... If your talking about a bruise, then not usually, just be cautious of any radical changes in case of an infection, but a bruise is reasonable, seeing how it is trauma. If your talking about blood, then on occasion depending on your vantage point it may appear purple, don't worry it's just perspective.
