Hello. I have I question about chemistry. How to find the volume and density of 2- propanol.?

In the relationship between mass, volume and density, you MUST know two of the three things in order to calculate the third one.

Here, you have given the mass of 2-propanol, but without knowing the volume you are stuck.

Now, in this lab, did you by chance fill the flask with water and determine the mass of water that fills the flask? If so, since the density of water is known, you can use that to calculate the volume of the flask. That volume wouldn't change, so that you might actually know the volume of the flask.

Hope that helps...