what volume of 0.5 BaCl2 is needed to have 0.1 moles of BaCl2?

See your post under Mackenzie.

To find the volume of 0.5 M BaCl2 needed to have 0.1 moles of BaCl2, you'll need to use the formula:

Volume (in liters) = moles / molarity

First, let's identify the given information:
- Moles of BaCl2 = 0.1 moles
- Molarity (M) of BaCl2 = 0.5 M

Using the formula, substitute the values:

Volume = 0.1 moles / 0.5 moles per liter
Volume = 0.2 liters

Therefore, 0.2 liters of 0.5 M BaCl2 solution is needed to have 0.1 moles of BaCl2.