Forwarded from Maxmudov Azamat
4.1. 400 g 25% li tuz eritmasiga 100 g suv va 50 g tuz qo‘shilib, 100 g suv bug‘latildi. Hosil bo‘lgan eritma sovitilganda 50 g tuz cho‘kmaga tushdi. Oxirgi eritmaning foiz konsentratsiyasini (%) aniqlang.
A) 20 B) 30 C) 25 D) 35
A) 20 B) 30 C) 25 D) 35
Forwarded from Maxmudov Azamat
4.2. 500 g 20% li tuz eritmasiga 100 g suv va 50 g tuz qo‘shilib, 100 g suv bug‘latildi. Hosil bo‘lgan eritma sovitilganda 50 g tuz cho‘kmaga tushdi. Oxirgi eritmaning foiz konsentratsiyasini (%) aniqlang.
A) 25 B) 15 C) 30 D) 20
A) 25 B) 15 C) 30 D) 20
Forwarded from Maxmudov Azamat
5.1. 100 g 30% li eritma tayyorlash uchun osh tuzining 60% li va 20% li eritmalaridan qanday massada (g) aralashtirish kerak?
A) 25; 75 B) 40; 60 C) 30; 70 D) 50; 50
A) 25; 75 B) 40; 60 C) 30; 70 D) 50; 50
Forwarded from Maxmudov Azamat
5.2. 120 g 35% li eritma tayyorlash uchun osh tuzining 65% li va 25% li eritmalaridan qanday massada (g) aralashtirish kerak?
A) 40; 80 B) 30; 90 C) 50; 70 D) 60; 60
A) 40; 80 B) 30; 90 C) 50; 70 D) 60; 60
Forwarded from Maxmudov Azamat
5.3. 150 g 40% li eritma tayyorlash uchun osh tuzining 70% li va 25% li eritmalaridan qanday massada (g) aralashtirish kerak?
A) 60; 90 B) 75; 75 C) 50; 100 D) 40; 110
A) 60; 90 B) 75; 75 C) 50; 100 D) 40; 110
Forwarded from Maxmudov Azamat
6.1. 12,04·10²² dona oltingugurt(VI) oksid molekulasi qanday massadagi (g) suvda eritilganda 25% li sulfat kislota eritmasi hosil bo‘ladi?
A) 68,4 B) 78,4 C) 98 D) 58,8
A) 68,4 B) 78,4 C) 98 D) 58,8
Forwarded from Maxmudov Azamat
6.2. 18,06·10²² dona oltingugurt(VI) oksid molekulasi qanday massadagi (g) suvda eritilganda 30% li sulfat kislota eritmasi hosil bo‘ladi?
A) 88 B) 108 C) 98 D) 78
A) 88 B) 108 C) 98 D) 78
Forwarded from Maxmudov Azamat
6.3. 24,08·10²² dona oltingugurt(VI) oksid molekulasi suvda eritilganda 40% li sulfat kislota eritmasi hosil bo‘ldi. Hosil bo‘lgan eritmaning massasini (g) aniqlang.
A) 88 B) 98 C) 108 D) 78
A) 88 B) 98 C) 108 D) 78
Forwarded from Maxmudov Azamat
7.1. 100 g 14% li CuSO₄ eritmasiga 25 g CuSO₄·5H₂O kristallogidrati qo‘shildi. Olingan eritmaning konsentratsiyasini (%) hisoblang.
A) 20 B) 28 C) 24 D) 30
A) 20 B) 28 C) 24 D) 30
Forwarded from Maxmudov Azamat
7.2. 150 g 12% li CuSO₄ eritmasiga 50 g CuSO₄·5H₂O kristallogidrati qo‘shildi. Olingan eritmaning konsentratsiyasini (%) hisoblang.
A) 20 B) 30 C) 15 D) 25
A) 20 B) 30 C) 15 D) 25
Forwarded from Maxmudov Azamat
7.3. 100 g 13% li CuSO₄ eritmasiga 50 g CuSO₄·5H₂O kristallogidrati qo‘shildi. Olingan eritmaning konsentratsiyasini (%) hisoblang.
A) 24 B) 30 C) 35 D) 28
A) 24 B) 30 C) 35 D) 28