Cuando 27.5 g hierro (PmFe=55g/mol, PmCl=35.5g/mol PmH=1 g/mol) reacciona con una disolución 0.5M de äcido clorhídrico, da dicloruro de hierro (FeCl2) y desprende hidrógeno molecular.(H2) a) Escribe y ajusta la reacción química
b)Calcula el número de moles de hierro que reaccionan.
c) Calcula el volumen de disolución necesario
d)Calcula la masa de sal que se produce d)Calcula el volumen de gas que se desprende

According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another? the volume and the shape stay the same. the volume increases to fill the new container, but the shape stays the same. the volume stays the same, but the shape changes to fit the new container. the volume and the shape change to fill the new container.

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .