Question

A sample of vitamin C is known to contain `2.58 xx 10^(24)` oxygen atoms. How many molesof oxygen atoms are present in the sample?

Answer 1

`6.022xx10^(23)"atoms of oxygen are present"=1"mol atoms"`
`2.58xx10^(24)"atoms of oxygen are present"=(1"mol atoms")/((6.022xx10^(23)))xx(2.58xx10^(24))`
=4.28mol atoms=4.28mol atoms