Consider the following reaction at equilibrium: 2 NO_2(g) \rightleftharpoons N_2O_4(g). How would chemical equilibrium be perturbed when the external pressure on the system is decreased

Which substances have the lowest melting points: ionic covalent, or metallic

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

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.