Q. The second most abundant compound in seawater

A
Magnesium Chloride
B
Sodium Chloride
C
Magnesium Oxide
D
Calcium Phosphate
Solution:

The most abundant dissolved ions in seawater are sodium, chloride, magnesium, sulfate and calcium.The most abundant compound in seawater- Sodium Chloride and the second most abundant compound in seawater- Magnesium Chloride.

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