The mass of a single tantalum atom os 3.01 x 10^-22 grams. How many tantalum atoms would there be in 81.3 milligrams of tantalum?

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.