La absorción de un medicamento (M) esta descrita por: 2M -- A + B
La reacción tiene una constante de velocidad 5,20x10-3 L/µgh y es de segundo orden
con respecto a M. Cuánto tardará en iniciar su efecto terapéutico, si se parte de una
concentración inicial de 5000µg/L y se requiere que su concentración en sangre llegue
a sr de 780 µg/L (en minutos)

answer; 4 electrons;

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.  

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.