Anybody know this because I’m so confused I’ll give you brainless

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.

What is the value of the standard enthalpy of formation of an element in its most stable form?

What is the correct lewis dot structure for arsenic?