What are the masses of subatomic particles in their atomic mass unit

If the empirical formula of a compound is known what is needed in order to determine the molecular formula a) the coordination numbers b)the molecular geometry c) the molar mass

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

Which statement justifies that hydrogen peroxide (h2o2) is a polar molecule? the o – h bond is nonpolar and the molecule is asymmetric. the o – h bond is nonpolar and the molecule is symmetric. the o – h bond is polar and the molecule is asymmetric. the o – h bond is polar and the molecule is symmetric.