Question

Calculate the percentage oxygen in dinitrogen pentoxide

Answer 1

So, To calculate the mass percentage of dinitrogen pentoxide (N2O5) we will first calculate the molar weight of the molecule. The mass percentage will be calculated with the following equation:

`\text{Mass percentage = }\frac{\text{Molar Mass oxygen}}{MolarmassmoleculeN_2\text{O}_5}*100`

Molar mass will be:

Element Atomic Mass #Atoms Mass

N 14.0067 2 28.0134 g/mol

O 15.9994 5 79.997 g/mol

Total mass = 28.0134 + 79.997 = 108.0104 g/mol

`\text{Mass percentage = }\frac{\text{7}9.997}{108.0104}*100\text{ = }74.064\text{ percent}`