The carbon released worldwide (by mankind) from burning coal and deforestation h

Question

The carbon released worldwide (by mankind) from burning coal and deforestation has recently been about 7.1 gigatonne per year (gt/y). This is the mass of carbon, not the mass of CO2. (which is larer)

A. What is the number of CO2 molecules released in a year from these sources? Remember that there are Avogadro's number (6*10^23) of molecules in a mole of material, and in this case there are 12g/mole. a tonne is 1000 kg.

B. What is the surface area of the Earth if its radius is 6.4*10^6m?

C. If the density of air is about 1kg/m^3 and the thickness of the atmosphere is about 10^4 mthick, what is the mass in kg of the atmosphere? (this mass could be found accurately by know the pressure of air at the surface.

D. Using this mass of the atmosphere, how many molecules are there in the Earth's atmosphere? Assume there are 29g/mole for air.

E. Using your two results for the number of molecules in parts a and d, find the ratio of CO2 molecules added per year to the number of air molecules. Express this as parts per million (ppm).

F. The actual rate of added CO2 is 3.3 ppm/y. Since 1970, there has been an increase in atmospheric CO2 of 1.4 ppm/y, so about half of what we put into the air stays there. where does the other half go>

Explanation / Answer

A) 7.1 GTonnes=> =7.1*10^15GMS=>MOLES=5.91*10^14 =>No of C02 molecules = moles * N= 3.56*10^38 molecules B) Area= 4pi*r^2=-5.147*10^14 m2 C)mass of atmp= volume * density= 1*area*thickness= 5.147*10^18kgs D)1no of moles= 1.77*10^20 moles -> Molecules= 1.06*10^44 molecules E)ppm= N of Co2/N of Amtp= 3.33ppm F)It is consumed by the tresss and gets dissolved in the ocean. pls rate...

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