Consider a mercury atom (z=80,A=200) a-) calculate its mass in kg
b-) how many atoms of mercury does a drop of mercury contain ?
mp=1.67×10-27 kg=mn
volume of a drop =0.05 ml
p mercury =13.6×10*3 kg. m*-3

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

Which of these is an intensive property of a substance

Which of the following is true about the speed of light? it depends on the wavelength.