Describe how you would prepare 250 ml of 0.20M Nacl using a 1.0 M stock solution of Nacl and distilled water

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

What is i fracture in the crust called when land move up, down or sideways

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium