Question

Please , I want to know each element content in its component ? Example :calcium %in dicalcium phosphate is 23 and phosphorus is 18 . what about zinc sulfate ,ferrous chloride ,copper oxide ..etc
Are there tables show the % of elements in its components?
Thanks Advanced

Answer 1

ZnSO4

$\mathrm{Mw}$ of $\mathrm{ZnSO4} = (65.409 + 32.065 + 15.9994^{*}4) == 161.4716 \mathrm{~g} / \mathrm{mol}$

w of $\mathrm{Zn} = \mathrm{n}^{*}\mathrm{Mw}(\mathrm{of}\mathrm{Zn}) / \mathrm{Mw}(\mathrm{of}\mathrm{ZnSO4})^{*}100\% = 1^{*}65.409 / 161.4716 = 40.508\%$

n - number of atoms in compound

The same for other elements in ZnSO4 (for FeCl2,CuO)

It was example how to calculate persent.

But there are some tables which can show you persent of element in compound. The name of that tables is "Percent composition by element"

You can find some tables in this site http://www.convertunits.com/molarmass/ZnSO4