When ammonium chloride is dissolved in water, the beaker gets cold. Which type of reaction does this describe? Exothermic
Endothermic
Both exothermic and endothermic
Neither exothermic nor endothermic

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18

Which substance has non polar covalent bonds

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