4. A 120.0 mg sample of a lead acetate hydrate, Pb(C2H3O2)2 × xH2O was heated to drive off the waters of hydration. The cooled residue had a mass of 103.0 mg. Calculate the value of x in the chemical formula. Show your work with Equation Editor.

The value of x in the chemical formula is 3.

Explanation:

Molecular mass of

Molecular mass of   = 325 g

Thus (325+18x) g of on heating gives = 325 g of

0.120 g of on heating should give = of which is given to be equal to 0.103 g

Thus

Solving for x

Thus the value of x in the chemical formula is 3.

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl