Se mezclan 200g de una disolucion de Sulfato De sodio (Na2SO4) al 10% m/m y d=1.09 g/ml con 120 ml de otra disolucion de la misma sal al 28% m/m y d=1.23 g/ml. Determina: 1.)concentracion m/m
2.)concentracion m/v de la disolucion final
3.)densidad de la disolucion final .

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

a electronegativity decreases beacuse the size of nucleus is bigger.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8