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Cosmic ray bombardment of the atmosphere produces neutrons, which in turn react w/ nitrogen to produce radioactive carbon14. Radioactive carbon14 enters all living tissue through carbon dioxide. As long as it is alive, carbon14 
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before 1900 the activity per mass of atmospheric carbon due to the presence of carbon14 averaged about 0.255bq/g of carbon 1. what fraction of carbon is carbon14 
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A gram of living plant material with Carbon14 , decays at a rate of about 16 disintegrations per minute. When the plant dies, the Carbon14 decays, with a halflife of 5600 years. A gram of the dead plant is found to decay at 
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You have 5 grams of carbon14; whose halflife is 5730 years. a)Write the rule of the function that gives the amount of carbon14 remaining after x years. b)How much carbon14 will be left after 4,000 years? c)When will there be 
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radioactive Carbon 14 in a dead organism decays according to the equation A=A e^.000124t where t is in years and A0 is the amount at t=0. Estimate the age of a skull uncovered in an archeological site if 10% of the original Carbon 
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Suppose that drilling into what was once a lake bottom produces a piece of wood which, according to its mass, would have contained 5 nanograms (5 billionths of a gram) of carbon14 when the wood was alive. Use the fact that this 
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i cant understand anything in carbon and its compounds. can you give me any the basics of what i need to learn in carbon and its compounds Carbon has a usual oxidation state(valence) of +4 and it can bond to itself. Therefore, 
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The halflife of carbon14 is 5730 years. How much of a 50 g sample of carbon14 is present after 11,460 years? 
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Chemical bonding question! The partial Lewis structure that follows (Figure 1) is for a hydrocarbon molecule. In the full Lewis structure, each carbon atom satisfies the octet rule, and there are no unshared electron pairs in the