A chemist prepares a solution of aluminum sulfite by measuring out of aluminum sulfite into a volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's aluminum sulfite solution. Round your answer to significant digits.

0.32 mmol/L

Explanation:

A chemist prepares a solution of aluminum sulfite by measuring out 16.1 μmol of aluminum sulfite into a 50 mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mmol/L of the chemist's aluminum sulfite solution. Round your answer to 2 significant digits.

Step 1: Convert aluminum sulfite from "μmol" to "mmol".

We will use the following conversion factors:

1 mol = 10³ mmol

1 mol = 10⁶ μmol

16.1 μmol × (1 mol / 10⁶ μmol) × (10³ mmol/1 mol) = 0.0161 mmol

Step 2: Convert the volume of solution from "mL" to "L"

We will use the conversion factor 1 L = 10³ mL.

50 mL × (1 L / 10³ mL) = 0.050 L

Step 3: Calculate the concentration of the solution in mmol/L

C = 0.0161 mmol  / 0.050 L  = 0.32 mmol/L

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