5) How many kilograms are there in 7.50 x 10^26 molecules of sulfuric acid?

Can someone me with questions 15 to 17 plz.

How much energy is made when a pice of wood burns. how do you know

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