Adouble replacement reaction occurs when aqueous potassium iodide and aqueous mercury (i) nitrate are mixed. what is the correct balanced chemical equation for this reaction? (1 point) ki(aq) + hgno3 (aq) yields khg(aq) + ino3(s) ki(aq) + hgino3 (aq) yields kno3 (aq) + hg(s) ki2 (aq) + hgno3 (aq) yields kno3 (aq) + hgi2 (s) ki(aq) + hg2no3 (aq) yields kno3(aq) + hg2i(s)

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.