\( \mathrm{X}_{2}\left(\mathrm{SO}_{4}\right)_{3} \) Weak base 1- Mention two different methods to dissolve the ppt. (A). 2- Find the mass of ppt. (A) + solution (B) which is produced from 26 g of \( \left.\mathrm{X}_{2}\left(\mathrm{NO}_{3}\right)_{2}\right)_{2} \).

ii. Metani nuk digjet në ajēr, neese nuk shkaktohet njé shkëndijë ose flakē. Pse? c) Kur 1 mol metani digjet në oksigjen, ndryshimi energjetik është - 890 kJ . i. Cfarē do të thotë shenja -? ii. Cila fjalë përshkruan një reaksion me këtē lloj

QuEsTION (a) Write the product(s) in the followins reactions: CH3 (i) \( \mathrm{CH}_{3}-\mathrm{CH}-\mathrm{O}-\mathrm{CH}_{2}-\mathrm{CH}_{3} \xrightarrow{\mathrm{HH}_{3}} \) ? + ?

[3-441] Hydrocyanic acid is one of the weak acids which is incompletely ionized, and its ionization is according to the following equation: \[ \mathrm{HCN}_{(\mathrm{aq})}+\mathrm{H}_{2} \mathrm{O}_{(0)} \rightleftharpoons \mathrm{H}_{3} \mathrm{O}^{+}(\mathrm{aq})+\mathrm{CN}^{-}(\mathrm{aq}) \] On adding drops of \( \mathrm{H}_{2} \mathrm{SO}_{4} \) solution: the concentration of \( \mathrm{CN}^{-} \)will ...... and on adding drops of KOH solution: the concentration of \( \mathrm{CN}^{-} \)will ...... a) decreases, increases b) increases, increases c) increases, decreases d) decreases, decreases

Which of the following are double displace- ment reactions?

7) Which box from Model 2 represents an element? * 1 point \( A \) B C D E 8) Which box from Model 2 represents a mixture of 2 elements? * 1 point A B C D E