Umumiy kimyo I bob. Atom tuzilishi va davriy qonun Atom tuzilishi. Elementar zarrachalar – proton, neytron, elektron

9. (00-5-9). Agar molekulaning massasi 44 m.a.b. ga teng bo’lsa, uning 1 mol miqdordagi molekulalar massasini toping.
A) 73 B) 6,02 ∙10²³ C) 44 D) 3,67 E) 88
10. (99-10-2). Kimyoviy birikmani tashkil etuvchi elementlarning massa ulushlari quyidagicha: H – 1,59%; N – 22,22%;
O – 76,19%. Shu birikmaning formulasini aniqlang.
A) HNO₂ B) HNO₃ C) NH₄NO₂ D) NH₄OH E) NH₄NO₃
11. (99-6-7). Moddalardan qaysi birining nisbiy molekulyar massasi 73 ga teng?
A) 2-amino-2-metilpropan – CH₃C(CH₃)(NH₂)CH₃
B) 2-aminopropan – CH₃CH(NH₂)CH₃
C) trimetilamin – (CH₃)₃N
D) dimetilizopropilamin –(CH₃)₂NCH(CH₃)₂
E) 2-amino-2-metilbutan – CH₃C(CH₃)(NH₂)CH₂CH₃
12. (00-5-8). Massaning atom birligi qiymatini (g) ko’rsating.
A) 2∙10^-23 B) 1,66 ∙10^-24 C) 1
D) 1/12 E) 12
13. (00-5-15). Azotning 1 ta molekulasining massasi (g) qanchaga teng?
A) 28 B) 14 C) 4,65 ∙10^-23
D) 2,32 ∙10^-23 E) 9,3 ∙10^-23
14. (00-5-24). Natriy perxloratning beshta molekulasi massasini hisoblang.
A) 612,5 B) 122,5 C) 30 ∙10^-23 D) 1,02 ∙10^-21 E) 10,2 ∙10^-23
15. (01-6-39). Simob atomining absolyut massasi necha gramm?
A) 2,4 ∙10^-24 B) 1,2 ∙10^-23
C) 1,5 ∙10^-22
D) 5,1 ∙10^-22 E) 3,3 ∙10^-22
16. (97-10-97). Bittadan kaliy va temir metallari atomlarining massalarini (g) toping.
A) 6,48 ∙10²³ va 0,93 ∙10^-23
B) 6,5 ∙10^-24 va 9,3 ∙10^-24
C) 6,48 ∙10^-23 va 9,3 ∙10^-23
D) 39 va 55,8
E) 3,9 ∙10^-23 va 5,6 ∙10^-23