Problem 111
Page 121
Section: Challenge Problems
Chapter 3: Molecules, Compounds, and Chemical Equations
Given information
Empirical formula of first compound
Mass of in first, second and, third compound
Mass in first compound , in second compound , and in third compound
Step-by-step explanation
Mass of in first compound
Mass in first compound
Empirical formula of first compound
Avogadro number is used to determine the number of atoms present in one mole of the compound.
Therefore,
This means that is equivalent to and is equivalent to
Therefore,
Mass of in second compound
One mole of contains
Therefore,
Mass of in second compound
One mole of contains
Therefore,
Therefore, the number of moles for is , and for is
In the empirical formula, the mole ratio of each element is determined by dividing by the smallest.
Therefore,
The simplest ratio for is,
The simplest ratio for is,
Therefore, the empirical formula of the second compound is .