Consider the following reaction: H2CO3(aq) + H2O(l) H3O+(aq) + HCO31-(aq)

The addition of which of the following will cause the equilibrium to shift, according to the common ion effect?

A. H2O

B. NaH

C. CN-

D. NH4+

When the earth was formed and cooled, why did nickel and iron end up in the center of the earth while basalt and granite ended up in the outer layers

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table?

How many grams of ammonia are produced when 1.0 mole of nitrogen reacts