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Set Kyar Wa Lar · Answer 1 · 2023-01-05T11:25:50+0000

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

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

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