The following equilibria exist in this solution: ■(H_2 X(aq)+H_2 O(l) ⇌ 〖HX〗^- (aq)+ H_3 O^+ (aq) &K_1=8.3× 10^(-8)@〖HX〗^- (aq)+H_2 O(l) ⇌ X^(2-) (aq)+ H_3 O^+ (aq) &K_2=1.0× 10^(-14) )The top reaction goes to equilibrium, and then the second reaction starts. Calculate the concentration of X2- in these solutions.

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.