Problem: How many molecules of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol.a. 5.54 x 1025 N2O4 moleculesb. 4.99 x 1023 N2O4 moleculesc. 4.59 x 1025 N2O4 moleculesd. 1.38 x 1024 N2O4 moleculese. 7.26 x 1023 N2O4 molecules

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For this problem, we’re being asked to determine the number of  N2O4 molecules found in 76.3 g CO2. The flow for this problem will be like this:


Mass of N2O(molar mass of N2O4)  Moles of N2O4 (Avogadro’s number)  Molecules of N2O4


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Problem Details

How many molecules of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol.

a. 5.54 x 1025 N2O4 molecules

b. 4.99 x 1023 N2O4 molecules

c. 4.59 x 1025 N2O4 molecules

d. 1.38 x 1024 N2O4 molecules

e. 7.26 x 1023 N2O4 molecules