Question 14 of 25 In which situation would dipole-dipole forces be significant?
O A. When molecules are nonpolar
B. When Van der Waals forces are also present
O c. When molecules have permanent dipole moments
O D. When no Van der Waals forces are present

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este