Answer:
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C and D
surface water is evaporated by the sun and concentrated the ocean salt and oceans are diluted when rivers flow into them
1 mole of any gas under STP ----- 22.4 L
18.65 L*1 mol/22.4 L ≈ 0.8326 mol N2
They push away from each other or repel due to the same charge they have.
