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Question
A compound 'X' consists of 4.8% of C and 95.2% of Br by mass.
Determine the empirical formula of this compound.
[C = 12, Br = 80]
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Solution
Empirical formula of compound :
| Element | Atomic mass | Percentage | Relative Number of moles | Simplest mole ratio | Whole number ratio |
| C | 12 | 4.8 | 4.8/12 = 0.4 | 0.4/0.4 = 1 | 1 |
| Br | 80 | 95.2 | 95.2/80 = 1.19 | 1.19/0.4 = 3 | 3 |
Empirical formula of the compound is CBr3.
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