Kimyo. (1 Qism)

A) 14,84 B) 15,1 C) 17,92 D) 9,6

227. 
     Fe₂O₃ va CuO dan iborat aralashma 55 g Mn bilan qizdirilganda 48 g oddiy modda hosil bo’ldi. Reaksiyaga kirishgan Fe₂O₃ massasini ( ) da toping. A) 32 B) 8 C) 17,92 D) 9,6
     

227. 
     0,125 mol C₄H_x alkan radikalidagi 5,2675 10²³ ta vodorod atomi bo’lsa , radikal valentligini toping.
     

A) II B) III C) I D) IV

227. 
     0,15 mol C₃H_x alkan radikalidagi 5,418 10²³ ta vodorod atomi bo’lsa , radikal valentligini toping.
     

A) II B) III C) I D) IV

227. 
     0,375 mol C₄H_x alkan radikalidagi 13,545 10²³ ta vodorod atomi bo’lsa , radikal valentligini toping.
     

A) II B) III C) I D) IV

227. 
     Element oksidi tarkibidagi atomlarning ekvivalent massalari o’zaro teng bo’lsa , shu elementning maksimal valentligi froridining molyar massasini ( ) toping.
     

A) 124 B) 146 C) 106 D)94

227. 
     Element sulfidi tarkibidagi atomlarning ekvivalent massalari o’zaro teng bo’lsa , shu elementning maksimal valentligi bromidining molyar massasini ( ) toping.
     

A) 224 B) 228 C) 246 D) 294

227. 
     Element sulfidi tarkibidagi element va oltingugurtning ekvivalent massa nisbati
     

3 : 2 bo’lsa elementning shu valentli okksidining molyar massasini ( ) aniqlang

A)64 B)80 C)48 D)72

227. 
     1 mol metal (II) karbonat tuz qizdirilganda 40
     

% unum bilan parchalandi.Olingan gaz va qoldiqning massalar farqi 112,8 g bo’lsa, metalning ekvivalent massasini ( ) toping.