¿Cuál de los siguientes enunciados es correcto con respecto a las reacciones químicas? * A. Las sustancias participantes sufren cambios físicos.
B. Se generan nuevas sustancias químicas llamadas reactantes.
C. Los reactantes y/o productos pierden átomos durante el proceso.
D. Los átomos participantes se reordenan y forman nuevos enlaces.

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.

How many moles are in 123.0 grams of kclo4?

Which of the following observations indicates that an atom has neutrons? some uncharged particles are scattered by a beryllium atom when it hits a gold foil. some uncharged particles bounce back from a gold foil when it is bombarded with alpha particles. a radiation consisting of uncharged particles is emitted when alpha particles strike beryllium atoms. a radiation which attracts electrons is produced when a beryllium atom is bombarded with alpha particles.