MCQ
A sample of pure compound contains $1.15\,g$ of sodium, $3.01 \times 10^{22}$ atoms of carbon and $0.1$ mol of oxygen atom. Its empirical formula is
- A$Na_2CO_3$
- ✓$NaCO_2$
- C$Na_2CO$
- D$NaC_2O$
✓
Answer
Correct option: B.
$NaCO_2$
b
$n_{Na}$ : $n_C$ : $n_{O}$
$n_{Na}$ : $n_C$ : $n_{O}$
$ = \frac{{1.15}}{{23}}$ : $\frac{{3.01 \times {{10}^{22}}}}{{6.02 \times {{10}^{23}}}}$ : $0.1$
$=$ $0.05$ : $0.05$ : $0.1$
$=$ $1$ : $1$ : $2$
$E.F.=NaCO_2$
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