Se añade agua a 40 kg de óxido de calcio (cal viva) hasta obtener 52,8 kg de hidróxido de calcio (cal apagada). La ecuación ajustada de la reacción es:

CaO (s) + H2O (I) → Ca(OH)2 (aq)

¿Qué cantidad de agua ha sido necesaria para llevar a cabo esta reacción?

Often on a topographic map, every fifth contour line is darkened. what is this line called? a. key b.slope c.benchmark d. index contour

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

What three things determine the shape and size of a puddle when water is poured out onto a surface