Se ponen a reaccionar 105 g de una muestra impura de Cu con 87% de pureza, Calcular cuántos gramos de producen de Cu(NO3)2 Cus+HNO3 (ac)→Cu(NO3)2 (ac)+NO(g)+H2O(l)

Much of the general structure and physical properties of the interior of the earth are inferred from: a)deep oil and gas bore holes b)geologic investigations c)analysis of seismic waves d) study of volcanoes

Which position represents spring in the southern hemisphere? a) b) c) d)

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.