b. Na2HPO4 + NaH2PO4.
A <em>buffer </em>is a solution of a weak acid and its conjugate base. The weak acid is H2PO4^(-) and its conjugate base is HPO4^(2-).
All the other options are incorrect because they consist of only a single component.
Answer:
They contain atoms that combine together to form molecules. In multicellular organisms, such as animals, molecules can interact to form cells that combine to form tissues, which make up organs. ... All atoms contain protons, electrons, and neutrons.
The addition of sodium chloride to pure water causes the conductivity to INCREASE. The more NaCl present in the water, the higher the conductivity is because NaCl is an electrolyte. Once dissolved in water, it becomes Na and Cl which are corpuscles that conduct electricity.
Rocks. Because the air water and soil are part of carbon.
According to the Big Bang Theory, the Universe is expanding, hence option A is correct
<h3>What is the Big Bang theory?</h3>
Big Bang Theory is a theory about the origin and the nature of the universe and the earth we live in.
According to the theory, the universe started at an energized tiny point and exploded with a great force.
Learn more about the Big Bang Theory here:
brainly.com/question/17209127
#SPJ1