Question: I need help with these two questions please 9) What are the equilibrium molarities of a 100.0ml solution that contains 40.789mg of Iron (III) sulfate

I need help with these two questions please

9) What are the equilibrium molarities of a 100.0ml solution that contains 40.789mg of Iron (III) sulfate hexahydrate? 10) How do you make a 100.00ml solution that is 50.00ppmCa+2,25.00ppm Co+2, and 10.00ppmPb+2 if you have three separate bottles of 1.000mg/ml standards of each metal

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