Answer:
Once living organisms.
Explanation:
Living organisms take a <em>very </em>long time to turn into fossil fuels, so it's not the first option.
Waste from living organisms is called "bio-fuel", not fossil fuel, so second option is wrong.
Ancient rocks are not fuel, so 3rd option is incorrect.
Hope this helps!
To solve this we assume that the gas is an ideal gas. Then, we can use the ideal gas equation which is
expressed as PV = nRT. At a constant temperature and number of moles of the gas
the product of PV is equal to some constant. At another set of condition of
temperature, the constant is still the same. Calculations are as follows:
P1V1 =P2V2
V2 = P1 x V1 / P2
V2 = 42.0 x 12.5 / 75.0
V2 = 7.0 L
Fire probably i dont know
