Question

How many moles of HBr are present in 250 ml of a 0.15 M HBr solution?

Answer 1

Answer:

0.0375 moles HBr

Explanation:

we are given;

• Molarity of HBr solution as 0.15 M
• Volume of the solution as 250 mL

We are required to determine the number of moles;

We need to know that;

Molarity = Moles ÷ Volume

Therefore;

Moles of HBr = Molarity of HBr solution × Volume of solution

Thus;

Moles of HBr = 0.15 M × 0.25 L

                      = 0.0375 Moles

Thus, the number of moles of HBr solute is 0.0375 moles