MGSO4 = 120.3 G/ mol
7H20 = 126 G / mol
MGSO4.7H2O = 246.3 Grams per mole
molar mass of Anhydrous MGSO4 = 120.3
Divide 120.3 by the hydrated mass of 246.3
SO… Multiply (120.3/246.3) with the mass of sample, which is 27 G, and you get the mass of the sample without the water.
Mass of sample without water is : ~13.2G
Source(s): AP Chem
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