then how do u find:

the volume of the H2O released, measured at 220 degrees C and 735mm Hg?

What are you starting with? The volume of H2O released would depend on the original volume before being raised to that temperature. Please repost question with adequate data.

I hope this helps. Thanks for asking.

To find the volume of water released, you need to know the original volume of water before it was heated to 220 degrees C. The change in volume can then be calculated using the principles of ideal gas law. However, in your question, the original volume is not provided, so it is impossible to determine the volume of water released.