Calculating Mass Effectiveness & Cost Effectiveness Of Antacid!?

A student analyzed an antacid tablet from a bottle of 50 tablets purchased at a discount store for $1.00. The mass of the tablet was 1.470 g. After adding 25.00 mL of 0.7989 M HCl solution to the tablet, the student back-titrated the excess HCl with 3.55 mL of 1.017 M NaOH solution.
a. Calculate the number of moles of stomach acid neutralized by one tablet.
b. Calculate the mass effectiveness of the tablet.
c. Calculate the cost effectiveness of one tablet

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