Answer: (D) environmental chemistry
Explanation:
Mass to moles
5.2 mol/Ca(no3)2 to mol
5.2 mol/Ca(no3)2 / molar mass
5.2 mol/Ca(no3)2 / 164.1= 0.032 g/Ca(no3)2
Substances that are less dense than water will FLOAT and substances with a density that is greater than 1.00g/ml will SINK.
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➷ This atom is Sodium (Na). Sodium is located in group 1 of the periodic table.
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