Question

A compound of relative molecular mass 34 and empirical formula $\mathrm{HO}$ has the molecular formula __________

Answer 1

Step 1:

we know the formula,

Molecular formula = (empirical formula)n

n (integer)$=\frac{\mathrm{molecular}\mathrm{weight}}{\mathrm{empirical}\mathrm{formula}}$

$=\frac{34}{17}=2$

Molecular formula $={\left(\mathrm{HO}\right)}_2$

$={\mathrm{H}}_2{\mathrm{O}}_2$

So, A compound of relative molecular mass 34 and empirical formula $\mathrm{HO}$ has the molecular formula ${\left(\mathrm{HO}\right)}_2$.