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Oxirgi xabar
2022-08-16 14:45:04
Channel name was changed to «Nev Scientist (канал)»
11:45
2021-12-03 07:14:53
Yechim
bu masalada CO2 yonmaydi
aralashma massasini ortishi CO ning hisobiga boradi.
Yani 13.2 - 10 = 3.2 g kislorod reaksiyaga kirishgan
x=5.6 3.2
CO + 0.5 O2 = CO2
28 16
10 g................100%
5.6 g..............x = 56%
4.4 g..............x = 44%
1.6K viewsQobiljon Rejabboyev, 04:14
2021-12-03 07:14:52
Yechim
vodorod massasini 35 ga ko‘paytirib aralashma o‘rtacha molyar massasini topib olamiz so‘ngra diogonalga qo‘yamiz.
2*35=70
64 10.............x =5
70
80 6..............x=3
... ----------------
.... 16 8 litr
1.5K viewsQobiljon Rejabboyev, 04:14
2021-12-01 20:18:50
Biror tuzning 80°C dagi eruvchanlik koeffitsienti uning 20°C dagi eruvchanlik koeffitsientidan 1.5 barobar ko‘p. Agar shu tuzning 80°C da to‘yingan 320 g eritmasi 20°C ga qadar sovitilganda 40 g tuz cho‘kmaga tushishi ma'lum bo‘lsa, shu tuzning 80°C dagi eruvchanlik koeffitsientini aniqlang.
1.2K viewsQobiljon Rejabboyev, 17:18
2021-12-01 20:14:28
Tuzining 10°C va 18°C dagi eruvchanlik koeffitsientlari 20 va 30 ga teng. 10°C li suvda 14 g tuz eritilib to‘yingan eritma olindi. Eritma temperaturasi 18°C gacha oshirildi va eritmada tuz eritilib to‘yintirildi. Olingan eritm' 4°C gacha sovitilganda 15.4 g tuz cho‘kmaga tushdi. Tuzning 4°C dagi eruvchanlik koeffitsientini aniqlang.
1.1K viewsQobiljon Rejabboyev, 17:14
2021-12-01 20:06:48
Glauber tuzining 90°C li 200 g to‘yingan eritmasi 0°C gacha sovitilganda hosil bo‘lgan eritmaning konsentratsiyani (%) hisoblang. Glauber tuzining 90°C da eruvchanligi 30 ga, 0°C da esa 4.5 ga teng.
972 viewsQobiljon Rejabboyev, 17:06
2021-12-01 20:01:35
32.5 g NH4Cl ning 100°C dagi to‘yingan eritmasini 0°C gacha sovitilganda hosil bo‘lgan eritmadagi xlor ionini to‘la cho‘ktirish uchun necha litr (0.2 mol/litr) AgNO3 eritmasi kerak bo‘ladi?
S(100°C) = 78.6
S (0°C) = 29.4
903 viewsQobiljon Rejabboyev, 17:01
2021-12-01 19:50:14
Marganes (II) sulfatning 25°C li suvda eruvchanligi eritma massasiga nisbatan 39.3% ga teng. Xuddi shunday haroratli 250 g suvda qancha miqdor (g) marganes (II) sulfat erishi mumkin.
834 viewsQobiljon Rejabboyev, 16:50
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