If you add the valences of each atom in the molecular formula for arsenious acid, H 3 AsO 3, you can see that the molecule, which is uncharged, has a total valence state of 0 (3x(+1) for the hydrogen atoms; 1x(+3) for the arsenic(III) atom; 3x(-2) for the oxygen atoms = 3+3-6 = 0).
Eighty percent of sewage in India is untreated and flows directly into the nation's rivers, polluting the main sources of drinking water, a study by an environment watchdog showed Tuesday.
An alarming 80% of Indiaâs surface water is polluted, a latest assessment by WaterAid, an internati... Read More. NEW DELHI: Even as India is making headlines with its rising air pollution levels, the water in the country may not be any better. An alarming 80% of India's surface water is polluted, a latest assessment by WaterAid, an international organization working for water sanitation and hygiene, shows.