How many aluminum atoms are in 3.86 g of aluminum?

Newtons second law deals most cosely with

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

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.