Joni finds an iron horseshoe and notices how it as a fine layer of red flaky material. On closer examination, it is a fine layer of rust. Given that the horseshoe is 430g, calculate the number of moles of pure iron the original horseshoe had?

1 Answer
Mar 30, 2017

Answer:

You have left a vital piece of information: the initial mass of the horseshoe..........i.e. just after if it was produced.

Explanation:

To a first approx. we know that there are #(430*g)/(55.8*g*mol^-1)~=# #8*mol# of iron...........

But we don't know much of the iron horseshoe has oxidized with respect to its initial mass. Quite probably, this is a negligible amount, but we #"dunno a priori"#.