If a buffer solution is 0.120 m in a weak acid (ka = 2.0 × 10-5) and 0.440 m in its conjugate base, what is the ph?

Which of the following describes a situation where competition between producers exists

What happens to the temperature of a substance when the average kinetic energy of its particles increases?

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.