Calculate the concentration in /μmol/L of the chemist's magnesium fluoride solution.

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A chemist prepares a solution of sodium nitrate by measuring out 2.1 *10^2 of sodium nitrate into 450 ml a volumetric flask and filling the flask to the mark with water.Calculate the concentration in the chemist's sodium nitrate solution. Round your answer to  significant digits.

A chemist prepares a solution of iron(III) bromide (FeBr3) by weighing out 17.78 g of iron(III) bromide into a 50. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in g/dL of the chemist's iron(III) bromide solution. Be sure your answer has the correct number of significant digits.

A chemist prepares a solution of aluminum chloride AlCl3 by measuring out 32.μmol of aluminum chloride into a 150.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in μmol/L  of the chemist's aluminum chloride solution. Be sure your answer has the correct number of significant digits.

A chemist prepares a solution of potassium dichromate (K,Cr,O,) by measuring out 35. g of potassium dichromate into a 300. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's potassium dichromate solution. Round your answer to 2 significant digits. alo | mol/L

A chemist prepares a solution of zinc oxalate (ZnC,0,) by weighing out 0.837 kg of zinc oxalate into a 100. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in g/dL of the chemist's zinc oxalate solution. Be sure your answer has the correct number of significant digits. x10 TP 一

A chemist prepares a solution of barium acetate BaC2H3O22 by measuring out 83.g of barium acetate into a 250.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in /molL of the chemist's barium acetate solution. Round your answer to 2 significant digits.

A chemist prepares a solution of sodium thiosulfate Na2S2O3 by measuring out 147.g of sodium thiosulfate into a 250.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in /molL of the chemist's sodium thiosulfate solution. Round your answer to 3 significant digits.

A chemist makes 780. mL of aluminum sulfate (Al₂(SO4)3) working solution by adding distilled water to 20.0 mL of a 0.0494 M stock solution of aluminum sulfate in water. Calculate the concentration of the chemist's working solution. Be sure your answer has the correct number of significant digits.