A chemist adds 0.55 L of a 0.22M sodium carbonate (Na₂CO3) solution to a reaction flask. Calculate the mass in grams of sodium carbonate the chemist has added to the flask. Be sure your answer has the correct number of significant digits. g X

When answering this problem, report the answer with the appropriate number of significant figures. When entering units, use proper abbreviated units with proper capitalization. A titration is performed to determine the amount of sulfuric acid, H2SO4, in a 6.5 mL sample taken from car battery. About 50 mL of water is added to the sample, and then it is titrated with 43.37 mL of a standard 0.5824 molar NaOH solution. You balanced this reaction in a previous problem. How many moles of sulfuric acid are present in the original sample? Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: ______x10 ____power_____units

a chemist adds 0.75L of a 0.69M nickel(II) chloride NiCl2 solution to a reaction flask. Calculate the mass in grams of nickel(II) chloride the chemist has added to the flask. Round your answer to 2 significant digits.

A chemist prepares a solution of iron II  chloride    FeCl2    by measuring out  3.0g  of  FeCl2  into a  300.mL  volumetric flask and filling to the mark with distilled water.   Calculate the molarity of Cl−  anions in the chemist's solution.   Be sure your answer is rounded to the correct number of significant digits.