How do I find the present difference?

Summary (complete the missing portions) Salt Metal Element % Metal Element Zn (NO;) 2 Zn 34.52 Fe(NO 3) 3 Fe 23.08 Cd(NO ;) 2 Cd 47.55 AgNO 3 Ag 63. 5 Hg2 (NO;) 2 Hg 38 - 2 To identify the salt, you will have to compare the values of the % Metal Element that you have just calculated with the % Metal that you experimentally found. Search for two values from the table above - that straddle your experimentally determined value (i.e. one value is slightly larger than your % Metal and one value that is smaller than your value.) Then, find the percentage difference between each of those values and your experimental value. (experimental value - table value) x 100 % difference = table value The %Metal Element from the table that gives the smaller % difference will e from your salt