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

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Our tutors have indicated that to solve this problem you will need to apply the Mole Concept concept. You can view video lessons to learn Mole Concept. Or if you need more Mole Concept practice, you can also practice Mole Concept practice problems.

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Based on our data, we think this problem is relevant for Professor Mindiola's class at UPENN.