Fanining stexiometrik qonunlari

15. Qaysi elementlar allotropik shakllarga ega emas?

A) H, O, N B) O, C, P C) S, P, O D) F, Cl, Br

16. Quyidagi moddalar to’plamidan qaysilari allotropik shakllarga ega?

A) suv, bug’, muz; B) suv, tuman, shudring;

C) vodorod, xlor, kislorod;

D) uglerod, fullerin, karbin, grafit.

5. ATOMLARNING HAQIQIY VA NISBIY MASSALARI.

1. Titan atomining massasini (kg) toping.

A) 7,97·10^-26 B) 7,11·10^-26

C) 7,97·10^-20 D) 6,97· 10^-26

2. Modda molekulasining massasi 5,65·10^-26 kg bo’lsa, uning nisbiy molekulyar massasi qanchaga teng?

A) 34 B) 36 C) 38 D) 32

3. Grafitda 120 ta uglerod atomi bo’lsa, grafitning haqiqiy (absolyut) massasini toping.

A) 2,9774·10^-25 B) 4,5597·10^-26

C) 2,3916·10^-21 D) 1,5643·10^-26

4. Kristall soda tarkibidagi tuz va kristalizatsiya suvining mol nisbati 1:10 bo’lsa, tuzning absolyut massasini (kg) toping.

A) 47,5·10^-26 B) 70,43·10^-26

C) 45,32·10^-26 D) 72,7·10^-26

5. Mis atomining absolyut massasi necha gramm?

A) 3,9 • 10^-23 B)1,063 • 10^-22

C) 6,4 • 10^-23 D) 2• 10^-22

6. Massaning atom birligi qiymatini ko’rsating.

A) 1,993•10^-23 B) 1,66•10^-24 C) 1 D) 1/12

7. Agar molekulaning massasi 44 m.a.b. ga teng bo’lsa, uning 1 mol miqdoridagi molekulalar massasini toping.

A) 73 B) 6,02•10²³ C) 44 D) 3,67

8. Simob atomining absolyut massasi necha grammga teng?

A) 3,338 •10^-22 B) 1,2•10^-23

C) 1,5•10^-22 D) 5,1•10^-22

9. Xona temperaturasidagi oltingugurt bug’i tarkibida bitta molekula Sx ning massasi

4,26 ·10^-22 g ga teng. Oltingugurt atomining massasi 5,32·10^-23 g ga teng bo’lsa, polioltingugurtda x ning qiymatini toping.

A) 6 B) 8 C) 10 D) 12

10. Azotning 1 ta molekulasining massasi (g) qanchaga teng?

A) 28 B) 14 C) 4,65•10^-23 D) 2,32•10^-23

11. Germaniy (IV)oksidning bitta molekulasining massasini (g) hisoblang.

A) 3,06•10^-22 B) 4,651•10^-23

C) 2,63•10^-23 D) 1,744•10^-22

12. 100 dona azot atomining massasi necha gramm bo’ladi?

A) 2,325•10^-21 B) 2,325•10^-24

C) 1,7•10^-21 D) 1,39•10^-22

13. Sellyuloza bitta molekulasining haqiqiy massasini (kg) toping.

A ) 22,4•10^-25 B) 33,2•10^-24

C) 26,9•10^-26 D) 28,9•10^-26

14. Oqsil molekulasining m.a.b.= 53,156 •10^-20 g bo’lsa, oqsilning molyar massasini toping.

A) 320000 B) 325000 C) 300000 D) 32000

15. Qaysi moddaning molekulyar massasi eng katta?

A) karbonat angidrid; B) sulfat kislota;

C) ichimlik soda; D) malaxit;