Qué tipos de reacción representa cada una de las siguientes ecuaciones químicas FeS + 2HCl → FeCl2 + H2S

NH2OH → NH2 + H2O

Smog is the term used to describe the combination of fog and smoke

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution