Final answer:
To find the number of moles of KBr in the solution, use the formula moles = molarity x volume.
Step-by-step explanation:
To determine the number of moles of KBr present in the solution, we can use the formula:
moles = molarity x volume
Given that the molarity of the solution is 0.275 M and the volume is 150 mL (or 0.150 L), we can substitute these values into the formula to find the number of moles:
moles = 0.275 M x 0.150 L = 0.04125 moles