15. Which of the following islare used to classify a star based on its temperature and luminosity? O A. Line spectra
O B. Hertzsprung-Russell diagram
O C. Blackbody spectrum
O D. Parallax measurements

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

What is the mass of 8 moles of sodium atoms

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a