S C Kheterpal, S N Dhawan and, P N Kapil Solutions for Chapter: Some Basic Concepts of Chemistry, Exercise 13: PROBLEMS FOR PRACTICE

An inorganic salt on analysis gave the following percentage composition: $\mathrm{Pb}=62.6$, $\mathrm{N}=8.4$, $\mathrm{O}=29$.

What is empirical formula of the compound? Also name the compound. (At. Mass: $\mathrm{Pb}=207, \mathrm{N}=14, \mathrm{O}=16$).

An oxide of nitrogen has the percentage composition:$\mathrm{N}=25.94$ and $\mathrm{O}=74.06$. Calculate the empirical formula of the compound.

A sample of a salt has the percentage composition: $\mathrm{Fe}=36.76; \mathrm{S}=21.11; \mathrm{O}=42.14;$

Calculate the empirical formula of the compound. (At. Mass: $\mathrm{Fe}=56; \mathrm{S}=32; \mathrm{O}=16;$).

A salt containing water of crystallization gave the following percentage composition: $\mathrm{Mg}=9.76; \mathrm{S}=13.01; \mathrm{O}=26.01; {\mathrm{H}}_2\mathrm{O}=51.22;$ 
Calculate the simplest formula. (At. Mass of $\mathrm{Mg}=24$).

Calculate the empirical formula of gold chloride which contains $35.1 \%$ of chlorine. At. Mass of $\mathrm{Au}=197$.

Calculate the empirical formula of a mineral having the following compositions. 

$\mathrm{CaO}=48.0 \%; {\mathrm{P}}_2{\mathrm{O}}_5=41.3 \%; {\mathrm{CaCl}}_2=10.7 \%;$