(a) (5 marks) For an aqueous solution containing 3.59 mM of SO2, what is the ration of SO2 in ppm? [Molar mass of sulfur is 32.065 g/mol]

(a) (5 marks) The major inorganic species in shark teeth is known as fluorapatite (FAp) with the formula of Cas(PO4)3F. If some of the "PO4" ions are substituted by carbonate ions, will the amount of ions per FAp unit increase, decrease, or remain the same? Explain why.