Interpretation:
The empirical formula is to be calculated using percentage composition.
Concept introduction:
The empirical formula is the formula which gives the simplest whole number ratio of the atoms present in the formula.
Answer to Problem 6STP
A
Explanation of Solution
To calculate empirical formula of a compound, percentage to the
Element | Percentage | Atomic mass | %/mass | Simple ratio | Whole no. ratio |
Li | 28.98 | 6.9 | 4.2 | 1 | 1 |
O | 66.81 | 15.9 | 4.20 | 1 | 1 |
H | 4.21 | 1 | 4.21 | 1 | 1 |
The simplest whole number ratio is:
Therefore empirical formula is
The calculations show correct empirical formula is
Chapter 13 Solutions
Chemistry: Matter and Change
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