In the following problem, which is the unknown quantity? A sample of helium gas has a volume of 546 mL at a pressure of 1.60 atm and a temperature of 137
°C. What is the pressure of the gas in atm when the volume is 657 mL and the temperature is 158°C?
A) P2
B) P1
C) V1
D) V2

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