Which one is an accurate description of an erosion?

Consider the following system at equilibrium. caco3(s) ca2+(aq) + co32–(aq) the addition of which compound will cause a shift in equilibrium because of a common ion effect? ccl4 co2 cuso4 na2co3

I’m an electrically neutral atomic any element, there are equal numbers of

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?