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pls help with question


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#1 naveen76g

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Posted 28 January 2009 - 05:02 AM

Can someone answer these two questions. Thanx

If 3X1014kg of CO2 are cycled through biosphere annually. How many human equivalents (70Kg persons composed of 18%C by weight) could be produced each year from this amount of CO2?


Isotope 32P Radiation type β half life 14.3 days
Isotope 35S Radiation type β half life 87.1 days
Write reactions for the decay events for these 2 isotopes, indicating clearly to the products of the decays and calculate what %of each would remain from sample that contained both and decayed for 100 days?

#2 perneseblue

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Posted 30 January 2009 - 04:01 AM

Can someone answer these two questions. Thanx

If 3X1014kg of CO2 are cycled through biosphere annually. How many human equivalents (70Kg persons composed of 18%C by weight) could be produced each year from this amount of CO2?


Isotope 32P Radiation type β half life 14.3 days
Isotope 35S Radiation type β half life 87.1 days
Write reactions for the decay events for these 2 isotopes, indicating clearly to the products of the decays and calculate what %of each would remain from sample that contained both and decayed for 100 days?


how about you give a try first and write out your answer. Try google to find the step in radio decay. Look up Wikipedia to show the equation used to calculate half life.
May your PCR products be long, your protocols short and your boss on holiday




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