How many grams of hydrogen (H2) form in this reaction, according to this balanced equation?

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

What characteristics does a earthquake have

What is the equation fort the alkaline zinc/manganese dioxide cell. a) anode b)cathode c)overall equations.