What is the difference between a heterogeneous mixture and a homogeneous mixture? * 1) You can not see the parts in a heterogeneous mixture, but you can in a homogeneous mixture.
2) You can see the parts in heterogeneous mixture, but you can not see them in a homogeneous mixture
3) Homogeneous mixtures may settle out while heterogenous mixture never settle out.

The answer is option 2) You can see the parts in heterogeneous mixture, but you can not see them in a homogeneous mixture.

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%

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