I have a question on my Chem homework. It's asking "How many molecules of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol." I am really confused as to how to do this. Help??
Here, Molar mass of N2O4 = 92.02 g/mol So, Number of molecules in 1 mole (92.02 g) = 6.023 10²³ Number of molecules in 76.3 g = 6.023 10²³ / 92.02 76.3 = 6.023 10²³ / 1.20 = 5 10²³
In short, Your Answer would be approx. 5 10²³ molecules
