Calculate the number of moles represented by 3.11×10^24 molecules of NO2.

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5.1644

Explanation:

Divide your number of molecules (3.11x10^24) by 6.022x10^23 because one mole contains  6.022x10^23 NO2 molecules.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

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