How much of a 200.0 gram sample of 198Au is left over after 15.20 days if its half-life is 3.8 days? How many ½ Lives? Then answer the question.​

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.