suppose you have 80g of a radioactive substance whose half life is 6 hours. how long will it take for the sample to decay to 70

What happens to isotopes that are unstable?

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

How many moles of oxygen react with 12 moles of aluminum