Which question can be answered by science?
does this medicine reduce fevers?
is it right to recycle?
which projects should be funded?
should we conserve water?

Does this medicine reduce fevers?

Explanation:

Questions or query related to science can be answered on the basis of direct observations and experimental trials.

Does this medicine reduce fevers? is the correct option because of the fact that this question can be answered by drug testing ,and clinical trials. These procedings will involve scientific experimentation and research.

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%