What is group 3-12 on the piratic table

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)

In the diagram here that represents the reaction, which reactant, a or b, is the limiting reagent?

How many moles of k3po4 can be formed when 4.4 moles of h3po4 react with 3.8 moles of koh? h3po4 + koh yields h2o + k3po4be sure to balance the equation.1.3 mol k3po41.9 mol k3po42.2 mol k3po44.4 mol k3po4?