Si tienes una disolución al 30 % en masa, ¿Cuál sería la nueva concentración si añades agua suficiente hasta duplicar su volumen?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel

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.