What is the molarity of the following solution? 3.48 mol in 4.1 L of solution

0.09 moles of sodium sulfate in 12 ml of solution

Define dew point. i am writing this part to be able to ask the question

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature