A reaction vessel contains equal masses of iron and oxygen. How much FeO could theoretically be produced? a. An amount equal to the sum of the masses of iron and oxygen.
b. An amount greater than the sum of the masses of iron and oxygen.
c. An amount less than the sum of the masses of iron and oxygen.
d. There is no way to tell.

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.