Pls ! ( pls be 100% of your answer)chlorine is made up of two isotopes. 35chlorine makes up 75.8% of chlorine and 37chlorine makes up 24.4%. what is the average atomic mass for chlorine? (assume chlorine-35 has a weight of 35 amu and chlorine-37 has a mass of 37 amu)

37.000 amu
35.000 amu
35.558 amu
34.969 amu

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