2.000 g TUMS tablet (CaCO3 and Binder) was analyzed in a lab. 11.42 mL of 0.871 M HCI was needed to dissolve the CaCO3 (active ingredient) of TUMS Tablet. Find the mass and % by mass of CaCO3 in TUMS Tablets. 459.00 mg O 75% O 50% 605.00 mg 30% O 25% 0 400.00 mg O 500.00 mg

If you weighed 0.9867 g of Zn pellets and prepared a standard solution in a 250.0 mL volumetric flask, What is the concentration of this solution? The molecular weight of the zinc pellets is 65.39 g/mol.     0.01509 M 0.0604 M 0.06036 M 6.04e-5 M 0.003772 M 258.1 M 6.036e-5 M

How many mL of water should be added to 50.0 mL of a 15.0 M H2SO4 solution to give a final concentration of 0.300 M? A) 950 mL B) 1000 mL C) 2450 mL D) 2500 mL

s (Ba²+) i A sample of 0.6760 g of an unknown compound containing barium ions is dissolved in water and treated with an excess of Na₂SO4. If the mass of the BaSO4 precipitate formed is 0.7548 g, what is the percent by mass of Ba in the original unknown compound? Round your answer to 4 significant digits. % Ba x