A chemist adds 310.0 mL of a 0.045 mmol/L sodium thiosulfate (Na₂S₂03) solution to a reaction flask. Calculate the mass in milligrams of sodium thiosulfate the chemist has added to the flask. Round your answer to 2 significant digits. mg x10 X

A chemist prepares a solution of potassium iodide (KI) by measuring out 1.0 x 10 umol of potassium iodide into a 150. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mmol/L of the chemist's potassium iodide solution. Round your answer to 2 significant digits. mmol

A chemist prepares a solution of calcium bromide (CaBr₂) by measuring out 0.599 kg of calcium bromide into a 400. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's calcium bromide solution. Be sure your answer has the correct number of significant digits. e mol/L Xx 扁 ol

A chemist adds 330.0mL of a 0.0536mM copper(II) sulfate CuSO4 solution to a reaction flask. Calculate the mass in milligrams of copper(II) sulfate the chemist has added to the flask. Round your answer to 3 significant digits.

A chemist adds 380.0 mL of a 0.00694 mmol/L calcium sulfate (CaSO4) solution to a reaction flask. Calculate the mass in milligrams of calcium sulfate the chemist has added to the flask. Round your answer to 3 significant digits. 1mg 0.9 X G

A chemist prepares a solution of zinc nitrate (Zn(NO,).) by weighing out 166. g of zinc nitrate into a 300. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in g/L of the chemist's zinc nitrate solution. Be sure your answer has the correct number of significant digits. x10

A chemist prepares a solution of mercury(II) iodide (HgI,) by weighing out 7.148 mg of mercury(II) iodide into a 150. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in g/L of the chemist's mercury(II) iodide solution. Be sure your answer has the correct number of significant digits. g x10

An analytical chemist weighs out 0.264 g of an unknown diprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled water. He then titrates this solution with 0.1900M NAOH solution. When the titration reaches the equivalence point, the chemist finds he has added 18.5 mL of NaOH solution. Calculate the molar mass of the unknown acid. Round your answer to 3 significant digits. x10 mol

A chemist adds 35.0 mL of a 0.163M potassium permanganate (KMnO4) solution to a reaction flask. Calculate the mass in grams of potassium permanganate the chemist has added to the flask. Round your answer to 3 significant digits. ☐ ☐x10 X

A chemist prepares a solution of calcium sulfate (CaSO4) by measuring out 0.28 g of calcium sulfate into a 250. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's calcium sulfate solution. Be sure your answer has the correct number of significant digits. E 0 10⁰ × x 10 mol/L 19 x10 C 6