How many gold atoms in a #"carat"#?

1 Answer
anor277
Aug 9, 2016

#"1 carat"# #=# #"0.007055 oz"# #=# #200*mg#, so...........

Explanation:

#"No. of moles"# #=# #"mass"/"molar mass"# #=#

#("22 carat"xx200*mg*"carat"^-1)/(196.97*g*mol^-1)# #=# #??mol#

And #"number of gold atoms"# #=#

#("22 carat"xx200xx10^-3g*"carat"^-1)/(196.97*g*mol^-1)xx6.022xx10^23*mol^-1#, which gives a result as a NOOMBER!

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