Saturday, April 24, 2010

Cats and moles PLEASE HELP....DUE TOM!!!**?

A mole of atoms is 6.02*10^23 atoms. To the nearest order of magnitude, how many moles of atoms are in a large domestic cat?





The masses of a hydrogen atom, an oxygen atom, and a carbon atom are 1.0u, 16u, and 12u





(HINT: cats are sometimes known to kill moles)

Cats and moles PLEASE HELP....DUE TOM!!!**?
First rough estimate that an average large cat weighs 7kg (Wikipedia)





Second, average molecular weight of the atoms. Take H20 (your body is mainly water). Molecular weight 18, atoms 3, average weight per atom 6.





Therefore, the average large cat has 7kg / 6 gr/mole=


1167 moles.





# atoms


= 1167 * 6.02x10^23


= 7.023 x 10^26 atoms


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