Match the substance on the left with mass of 3 moles of tht substance on the right

In which reaction is precipitation occurring?

How many grams of mgbr2 are needed to produce 75g or metal?

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)