Question #b7ed9
1 Answer
Oct 22, 2017
Explanation:
There is no formula—all you need is the Periodic Table!
The Periodic Table indicates that there are about
Thus, we can use the conversion factor
#"3.0" cancel("g Co") xx "1 mol Co" / ("58.933" cancel("g Co")) = "0.051 mol Co"#
Since the given information has only two significant figures, that's what we round to.