A chemist has three different acid solutions. The first acid solution contains \( 25 \% \) acid, the second contains \( 45 \% \) and the third contains \( 75 \% \). He wants to use all three solutions to obtain a mixture of 60 liters containing \( 55 \% \) acid, using 2 times as much of the \( 75 \% \) solution as the \( 45 \% \) solution. How many liters of each solution should be used? The chemist should use liters of \( 25 \% \) solution, \( 45 \% \) solution, and

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

Which of the following is an example of anionic interference in atomic emission spectroscopy? O Interference of high concentration of sodium ions in assay calcium ions. Interference by formation of less volatile salt with sulphat by calcium. Decreased drop size of the analyte solution by alcohols.

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?

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?

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