# What is the empirical formula for nitroglycerin?

The molecular formula for nitroglycerin is ${\text{C"_3"H"_5"N"_3"O}}_{9}$.
The empirical formula represents the lowest whole number ratio of elements in a compound. In the case of nitroglycerin, its formula ${\text{C"_3"H"_5"N"_3"O}}_{9}$ cannot be reduced further and keep the ratios whole numbers. Therefore, its molecular formula is the same as its empirical formula.