How many moles of potassium bromide are in 68.5 mL of a 1.65 M solution?

Answer is 0.11

Number of moles = 0.116 mol

Explanation:

Given dа ta:

Number of moles of potassium bromide = ?

Volume of solution = 68.5 mL

Molarity of solution = 1.65 M

Solution:

First of all we will convert the mL into L.

68.5 mL * 1 L / 1000 mL

0.07 L

Molarity = Number of moles / Volume in litter

we will rearrange the formula:

Number of moles = molarity * volume in litter

Now we will put the values in formula:

Number of moles = 1.65 M * 0.07 L

Number of moles = 0.116 mol