What is the mole fraction of 25.0 g of ethanol (c2h5oh) is added to 75.0 g of water to form 96.4 ml of solution

0.116

Explanation:

The molar mass of ethanol is 46.07 g/mol. The moles corresponding to 25.0 g are:

25.0 g × (1 mol/46.07 g) = 0.543 mol

The molar mass of water is 18.02 g/mol. The moles corresponding to 75.0 g are:

75.0 g × (1 mol/18.02 g) = 4.16 mol

The total number of moles is:

total moles = mol ethanol + mol water = 0.543 mol + 4. 16 mol = 4.70 mol

The mole fraction of ethanol is:

X(Ethanol) = mol ethanol / total moles = 0.543 mol / 4.70 mol = 0.116

50.23 i believe is correct but don't quote me on that.

alchemy hadn't scientific methods of study, appeal to mysticism and fantasy, the knowledge of chemistry and physics were modest at that time.

alchemy was - but as new rules were discovered it either changed into chemistry or it became "unscientific".