Question

How many moles of `MgI_2` will you have if you have 345.0 g of it?

Answer 1

A bit over `1` `mol`.

Explanation:

`"Number of moles"` `=` `"Mass"/"Molar Mass"`

`=` `(345.0*g)/(278.11*g*mol^-1)` `=` `??mol`.

How may moles of iodine does this represent? Why?