What is the prefix for four, 4, that is used in COVALENT compounds?

What is the solubility of substance?

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?

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