b) Cuál será la Epg de una piedra de 20 g de masa a 50 m de altura? Nota: recordá primero pasar los 20 g de masa a kg​

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Select the most likely product for this reaction: koh(aq) + co2(g) – ? k2co3(aq) + h2o(1) k(s) + h2(g) + o2(g) k(s) + co3(9) +h2

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