Question

Derive Moles and Volumes From Molar Concentrations Question A solution has 0.45 M of FeSO4. How many moles of FeSO4 are in a 20 mL drop of this solution? Select the correct answer below: a. 0.009 moles b. 0.044 moles c. 0.09 moles d. 9 moles

Answer 1

0.009 moles

Step-by-step explanation:

First, convert the milliliters of solution into liters:

20 mL×1L1000mL=0.02 L

Then, use the rearranged equation for molarity to calculate the number of moles.

Molarity=moles of soluteliters of solution

moles of solute=liters of solution×Molaritymoles FeSO4=0.02 L×0.45 M=0.009 moles