A solution having a volume of 3.0L contains 23 mmol of Oxygen 2. What is the molarity of this solution?

M = moles/L = 0.23/3 = ??

.0777

To find the molarity of a solution, we need to use the formula:

Molarity (M) = Number of moles of solute / Volume of solution (in liters)

In this case, we are given that the solution has a volume of 3.0L and contains 23 mmol of Oxygen 2.

First, we need to convert the number of moles from millimoles (mmol) to moles:

Number of moles of Oxygen 2 = 23 mmol / 1000 (to convert from mmol to mol)
= 0.023 mol

Now we can use the formula to find the molarity:

Molarity (M) = 0.023 mol / 3.0 L

Molarity (M) = 0.00767 M (rounded to the appropriate number of significant figures)

Therefore, the molarity of this solution is approximately 0.00767 M.