Calcium and magnesium dissolved in water are the two most common minerals that make water "hard." The degree of hardness becomes greater as the calcium and magnesium content increases and is related to the concentration of multivalent cations dissolved in the water.
<em>Hi,</em>
Answer:
<em> In the "Describe the Situation" step of the decision-making model, which of the following questions may be helpful to ask yourself?</em>
D. All of the above
Watery, runny eyes
Runny nose
Sneezing
Nasal congestion
Itchy rashes or hives.
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