63. Una soluzione di acido solforico al \( 39,7 \% \mathrm{~m} / \mathrm{m} \) ha densità \( 1,300 \mathrm{~g} / \mathrm{mL} \). A \( 200,0 \mathrm{~mL} \) di questa soluzione vengono aggiunti \( 150,0 \mathrm{~mL} \) di acqua. a) Determina la \( \% \mathrm{~m} / \mathrm{V} \) della soluzione iniziale e di quella diluita. b) È possibile determinare con questi dati la \( \% \mathrm{~m} / \mathrm{m} \) della soluzione finale?

Which of the following is the function of the atomiser in the emission system of Atomic Absorption Spectroscopy? To split the beam into two To break the steady light into pulsating light To break large mass of liquid into small drops To reduce the sample into atomic state

A metal is considered reactive if it easily loses electrons to achieve a stable octet. Would you prefer metal that readily loses electrons? How is this related to the metal's ionization energy? Would it be better for the metal to have high or low ionization energy?

3.Un trozo de hierro de 50 gramos se calienta a \( 100^{\circ} \mathrm{C} \) y luego se pone en agua fria, donde su emperatura baja a \( 30^{\circ} \mathrm{C} \) ¿Cuantas calorias cede el hierro al egua? (Ce s \( \mathrm{e}^{\left.-0.11 \mathrm{cal} / \mathrm{g}^{\circ} \mathrm{C}\right)} \)

À l'aide des documents, dire si l'eau oxygénée peut mettre en évidence une tache de sang et décrire ce que doit observer Justine si elle en applique sur la tache. S'appuyer sur des équations d'oxydoréduction pour étayer vos propos.

What is the hybridization of the central atom? \( s p \) \( s p^{2} \) \( s p^{3} d^{2} \) \( s p^{3} \) \( s p^{3} d \)