Se desean preparar 300 mL de una disolución de NaOH al 15 % P/V a partir de una disolución concentrada de hidróxido de sodio cuya densidad es de 1,39 g/mL y su título es 40 % P/P. a) ¿Cuántos mL de la disolución concentrada se necesitarán?

What elements have 2 electrons inthe 4s sublevel

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible? a. attractive forces between gas particles are negligible because the particles of an ideal gas are moving so quickly. b. collisions between gas particles are elastic; there is no net gain or loss of kinetic energy. c. gases consist of a large number of small particles, with a lot of space between the particles. d. gas particles are in constant, random motion, and higher kinetic energy means faster movement.

A2.5% (by mass) solution concentration signifies that there is a 2.5 % (by mass) solution concentration signifies that there is blank of solute in every 100 g of solution. of solute in every 100 g of solution