Answer:
C
Explanation:
The molar mass of an element is the same as its atomic mass (just different units)
In [tex]Ca(ClO_{4})_{2}[/tex] the breakdown is as follows:
1 Ca = 1(40.08) = 40.08
2 Cl = 2(35.45) = 70.90
8 O = 8(16.00) = 128.00
This adds up to ~239 g/mol for the entire compound. Hope this helps :)
