Calcular la normalidad de la solución de NaOH para 4 L de la solución al 25% m/m y cuya densidad sea 1,3 g/ml.

Gymnast always perform on padded mats. how does the mats protect the gymnast

This question is about electrolysis. metal spoons can be coated with silver. this is called electroplating. suggest one reason why spoons are electroplated?

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature