A 90.00 g sample of Na₂CO₃*xH₂O is heated until all of the water is driven off, forming 32.28 g of the anhydrous salt, Na₂CO₃. What is the percent by mass of H₂O in the hydrated compound, Na₂CO₃*xH₂O? A) 14.53% H₂O
B) 37.03% H₂O
C) 64.13% H₂O
D) 68.85% H₂O

Substance 33°f 100°f peanut oil solid liquid margarine solid liquid chocolate chips solid liquid which conclusion fits the data in the table? a. heat chemically changes chocolate and margarine. b. all solids become liquid at 100°f. c. removing heat from a substance it to melt. d. matter may change shape when it is heated.