The molar mass of calcium chloride (cacl2) represents the mass of one mole of: a) cacl2 molecules b) calcium ions and chlorine molecules c) cacl2 formula units or d) cacl formula units

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.