combustion analysis of a hydrocarbon produced 33.01g CO2 and 13.51g H2O. Calculate the empirical formula for the hydrocarbon

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Explanation:

Carbon and hydrogen are the only two elements in a hydrocarbon. When a hydrocarbon combusts completely in excess oxygen, the products would be and . The and would come from the hydrocarbon, while the atoms would come from oxygen.

Look up the relative atomic mass of these three elements on a modern periodic table:

Calculate the molar mass of and :

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Calculate the number of moles of molecules in of :

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Similarly, calculate the number of moles of molecules in of :

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Note that there is one carbon atom in every molecule. Approximately of molecules would correspond to the same number of atoms. That is: .

On the other hand, there are two hydrogen atoms in every molecule. approximately of molecules would correspond to twice as many atoms. That is: .

The ratio between the two is: .

The empirical formula of a compound gives the smallest whole-number ratio between the elements. For this hydrocarbon, the empirical formula would be .

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

the answer is d.) potassium