How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen?

Hey there!

The number of molecules is the same.

One mole of a type of molecule is always 6.022 x 10²³ molecules, so no matter what the type of molecule is there will be the same amount of molecules.

The mass, volume, or other properties can be different, but the number of molecules will be the same.

Hope this helps!

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."