How can the law of conservation of
mass for a chemical reaction be expressed?

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

How many moles of al3+ ions are in 1.25 moles of al2o3

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