Chapter 4, Problem 6P

It is estimated that the total amount of oxygen (O2) contained in BIFs is equivalent to 6.6% of the oxygen present in the modern atmosphere. This is quite impressive given that the atmosphere during Archaean and early Proterozoic times was largely devoid of oxygen! Therefore, this reflects the photosynthetic efficiency of the early biosphere, coupled with its operation over long periods of time. Knowing that the mass of the modern atmosphere is 5.01×1018 kg, of which 21% is oxygen, what is the mass (in kilograms) of oxygen contained within BIFs? Answer x 1016 kg of O2 contained in BIF deposits     Knowing that the molecular mass of O2 is 32 g/mole (0.032 kg/mole), how many moles of O2 are contained within BIFs? Answer x 1018 moles of O2 contained in BIF deposits   Not sure what the "answers" are?

It is estimated that the total amount of oxygen (O2) contained in BIFs is equivalent to 6.6% of the oxygen present in the modern atmosphere. This is quite impressive given that the atmosphere during Archaean and early Proterozoic times was largely devoid of oxygen! Therefore, this reflects the photosynthetic efficiency of the early biosphere, coupled with its operation over long periods of time. Knowing that the mass of the modern atmosphere is 5.01×1018 kg, of which 21% is oxygen, what is the mass (in kilograms) of oxygen contained within BIFs?

Suppose a species of bacteria divides once every 20 minutes. You start with a single bacterium on your unrefrigerated ham and cheese sandwich at 8:00 am. Show that when you sit down to lunch at noon, there will be 4096 bacteria on your sandwich.

Nanotechnology in illness prevention and treatment? How does another nanotechnology work?

What is PPM2?