Which of the following processes absorbs heat? a. Dry ice sublimates at room temperature to form \( \mathrm{CO}_{2} \) gas. b. \( \mathrm{NH}_{3} \) gas condenses under a cold bath of \( -35^{\circ} \mathrm{C} \) to the liquid form. c. Liquid glacial acetic acid freezes in an ice-water bath. d. Iodine vapor captured in a jar forms crystalline iodine when it contacts the cooler lid.

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

28. \( \mathrm{HgO} \rightarrow \mathrm{Hg}+\mathrm{O}_{2} \)

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

Quanti grammi di soluto bisogna aggiungere a \( 50,0 \mathrm{~g} \) di una soluzione al \( 10,0 \% \mathrm{~m} / \mathrm{m} \) perché la sua concentrazione raddoppi?

Question 1 Releasing agents are used in atomic emission spectroscopy to prevent O Cationic interference O Anionic interference Ooth anionic and cationic O Physical interference