Mole Concept and Molar Masses

The composition of a sample of wustite is ${\mathrm{Fe}}_{0.93}{\mathrm{O}}_{1.00}$.  What percentage of iron is present in the form of Fe (III)?

The number of gram molecules of oxygen in  $6.02\times {10}^{24}\mathrm{\hspace{0.17em}}\mathrm{CO}$ molecules is:

Ratio of  $C_{p}and{C}_v$ of a gas 'X' is 1.4. The number of atoms of the gas ‘X’ present in 11.2 litres of it at NTP will be

Which has the maximum number of molecules among the following?

Which has the maximum number of molecules among the following?

Volume occupied by one molecule of water (density  $=1gc{m}^{-3}$ ) is:

The maximum number of molecules are present in:

Which has maximum number of molecules?

Percentage of Se in peroxidase anhydrase enzyme is  $0.5\%$ by weight  $(at.wt.=78.4)$ then minimum molecular weight of peroxidase anhydrase enzyme is

An organic compound containing  $C,HandO$ gave on analysis  $C-40\%andH-6.66\%.$ Its empirical formula would be:

Haemoglobin contains  $0.334\%$ of iron by weight. The molecular weight of haemoglobin is approximately $67200.$  The number if iron atoms (atomic weight of Fe is 56) present in one molecule of haemoglobin are:

An organic compound containing $\mathrm{C}, \mathrm{H} \mathrm{and} \mathrm{N}$ gave the following analysis:

 $\mathrm{C}=40\mathrm{\%};\mathrm{H}=13.33\mathrm{\%};\mathrm{N}=46.67\mathrm{\%}$

Its empirical formula would be:

The percentage weight of Zn in white vitriol  $[ZnS{O}_4.7H_{2}O]$ is approximately equal to  $(Zn=65,S=32,O=16andH=1)$