A sample of mixed carbonates, Li2CO3 (73.89 g/mol) and SrCO3 (147.63 g/mol), weighed 0.5310 grams. If this sample is titrated with acid, it is found that 20.10 mL of 0.5010 M HCl are required to reach the endpoint. Calculate the percentage of SrO (103.62 g/mol) in the sample? Li2CO3 and SrCO3 are the only components in the sample.