Dumbledore decides to gives a surprise demonstration. He starts with a hydrate of Na2CO3 which has a mass of 4.31 g before heating. After he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. He asks everyone in class to determine the integer x in the hydrate: Na2CO3·xH2O; you should do this also. Round your answer to the nearest integer.

Answer : The integer 'x' in the hydrate is, 2

Explanation : Given,

Mass of hydrate = 4.31 g

Mass of anhydrous = 3.22 g

First we have to calculate the mass of water.

Mass of water = Mass of hydrate - Mass of anhydrous

Mass of water = 4.31 g - 3.22 g

Mass of water = 1.09 g

Now we have to calculate the moles of and

Molar mass of = 18 g/mol

and,

Molar mass of = 106 g/mol

Now we have to calculate the ratio of and

The formula of compound is,

The value of 'x' is, 2

So, the formula of compound is,

Thus, the integer 'x' in the hydrate is, 2

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

the answer is c i took the test