How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen? 1) 1 mol of oxygen has fewer molecules.2) 1 mol of oxygen has more molecules.3) each sample has the same number of molecules.4) the molecules cannot be compared without knowing the mass.

When the ionic compound nabr dissolves in water, br– ions are pulled into solution by the attraction between what two particles? a. the na+ and br– ions b. the na+ ion and the negative end of a water molecule c. the br– ion and the positive end of a water molecule d. the br– ion and the negative end of a water molecule