the given graduated cylinder is calibrated in
milliliters (ml).
determine the volume of liquid in the graduated cylinder
and report it to the correct number of significant figures.

For this case, the first thing you should do is observe the level of the liquid in the graduated cylinder, where it is located.

This will result in its volume.

We have then that the volume is given by:

the volume of liquid in the graduated cylinder is:

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%