18 Nov 2021
Problem 116
Page 121
Section: Challenge Problems
Chapter 3: Molecules, Compounds, and Chemical Equations
Textbook ExpertVerified Tutor
18 Nov 2021
Given information
Mass percentage of 
in the rock is 
.
Mass percentage of 
in the rock is 
.
Mass percentage of 
in the rock is 
.
Step-by-step explanation
Step 1.
Mass percentage of different lead ores are given, assuming that the total mass is 
.
Therefore, mass of is 
, mass of is 
, and mass of is 
.
Formula mass is defined as the sum of the average atomic masses of all the atoms present in the chemical formula of any compound.
Therefore,
Atomic weight of lead is 
.
Molar mass of is 
.
Molar mass of is 
.
Molar mass of is 
.
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