41. During a chemical reaction, number of electrons changes but number of proton remains constant. Why?
Your answer

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium

Explain how global warming could have affected yellowstone frog and salamander habitat's, resulting in changes in the populations of these species