What is the net charge of an ion that has 8 protons, 9 neutrons, and 10 electrons

What layer of the atmosphere is directly above the troposphere?

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

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest