Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 2 - Atoms, Molecules, and Ions - Exercises - Page 74: 2.12c

Answer

The sum of the masses of the products equals the sum of the masses of the reactants. 6.500 g = 0.384 g + 6.116 g.

Work Step by Step

Postulate 1 of Dalton's Atomic theory states that "All matter is made of atoms. Atoms are indivisible and indestructible." This means matter cannot be created nor destroyed, so chemical reactions will produce products with the same mass as the mass of the reactants. The decomposition of 6.500 g of hydrogen sulfide yields 0.384 g of hydrogen and 6.116 g of sulfur. This fits Dalton's theory because 6.500 g = 0.384 g + 6.116 g.
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