If we want to study the relative arrangement of atoms in a molecule,we study:

If the fertilizers listed below are priced according to their nitrogen content,which will be the least expensive per $50 \ kg$ bag?

$120 \ g$ of an organic compound that contains only carbon and hydrogen gives $330 \ g$ of $CO_{2}$ and $270 \ g$ of water on complete combustion. The percentage of carbon and hydrogen,respectively,are ...... .

Insulin contains $3.4\%$ sulfur. What is the minimum molecular weight of insulin?

$64 \, g$ of an organic compound contains $24 \, g$ of carbon,$8 \, g$ of hydrogen,and the rest oxygen. The empirical formula of the compound is

How much copper can be obtained from $100 \, g$ of copper sulphate $(CuSO_{4})$?