Which of the following is true? a Liquids are denser than gases b Liquids are less dense than gases c Liquids and gases are the same density d None of the above

\( \mathrm{X}_{2}\left(\mathrm{SO}_{4}\right)_{3} \) 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 \( \left.\mathrm{X}_{2}\left(\mathrm{NO}_{3}\right)_{2}\right)_{2} \).

D) 22.5 g ¿Cuántos gramos hay en 0.750 moles de glucosa y en 1.5 moles de anhidrido carbónico? A) 180 g y 44 g B) 360 g y 88 g C) 135 g y 66 g D) \( 6.022 \times 10^{-23} \) y \( 3.011 \times 10^{-23} \)

\( \mathrm{X}_{2}\left(\mathrm{SO}_{4}\right)_{3} \) 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 \( \left.\mathrm{X}_{2}\left(\mathrm{NO}_{3}\right)_{2}\right)_{2} \).

(a) Write the systematic names for the following: (i) \( \mathrm{CH}_{3} \mathrm{CH}\left(\mathrm{CH}_{3}\right)-\mathrm{CH}_{2}\left(\mathrm{CH}_{3}\right) \mathrm{CH}_{2} \mathrm{CH}_{3} \) (ii) \( \mathrm{CH}_{3} \mathrm{CH}\left(\mathrm{C}_{2} \mathrm{H}_{5}\right) \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Cl} \) (iii) \( \mathrm{CH}_{3} \mathrm{C}\left(\mathrm{CH}_{3}\right)=\mathrm{CH}_{2} \) (iv) \( \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{C}=\mathrm{CCH}_{2} \mathrm{CH}_{3} \) (v) \( \mathrm{CHBr}_{3} \)

X. (a) Write the systematic names for the following: (i) \( \mathrm{CH}_{3} \mathrm{CH}\left(\mathrm{CH}_{3}\right)-\mathrm{CH}_{2}\left(\mathrm{CH}_{3}\right) \mathrm{CH}_{2} \mathrm{CH}_{3} \) (ii) \( \mathrm{CH}_{3} \mathrm{CH}\left(\mathrm{C}_{2} \mathrm{H}_{5}\right) \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Cl} \) (iii) \( \mathrm{CH}_{3} \mathrm{C}\left(\mathrm{CH}_{3}\right)=\mathrm{CH}_{2} \) (iv) \( \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{C}=\mathrm{CCH}_{2} \mathrm{CH}_{3} \) (v) \( \mathrm{CHBr}_{3} \)