The value of henry’s law constant kh for oxygen in water at 25°c is 1.66x10^-6 m/torr. calculate the solubility of oxygen in water at 25°c when the total external pressure is 1 atm and mole fraction of oxygen in the air is 0.20

Areaction in which products can react to re-form reactants is

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.

Choose all the answers that apply. fluorine (f) has an atomic number of 9 and an atomic weight of 18.99. fluorine has a. 9 protons b. 10 neutrons c. 18 electrons d. an atomic mass of 19 e. at least one isotope