kaliy superoksididagi kislorod atomlarining umumiy holatdagi oksidlanish darajalari qiymati?
Anonymous Quiz
34%
-1, -1
29%
-0.5, -0.5
27%
-1, 0
10%
-1, +1
kaliy superoksididagi kislorod atomlarining oniy holatdagi oksidlanish darajalari qiymati?
Anonymous Quiz
38%
-1, -1
22%
-0.5, -0.5
32%
-1, 0
8%
-1, +1
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(x–3)–(y+2)=2
x–y=7
3+x–y=z
z=10
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❤1
IYUN
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2️⃣6️⃣0️⃣5️⃣2️⃣4️⃣
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Kalsiy gipofosfit molekulasidagi kimyoviy bog'lar sonini toping?
Са(Н2РО2)2 — (2*2*2)O+(2*2)H=12
✅ 12
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Са(Н2РО2)2 — (2*2*2)O+(2*2)H=12
✅ 12
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❤1
P4S7 + NO3- + H2O = PO4(3-) + SO4(2-) + H+...
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1,1•10^-8 M li HCl eritmasi pH qiymati topilsin.
A) 7
B) 6,98
C) 8
D) 7,02
B)✅ pH=-lg(0,00000011)=6,98
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A) 7
B) 6,98
C) 8
D) 7,02
B)✅ pH=-lg(0,00000011)=6,98
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Qum hamomi nima maqsadda foydalaniladi?
✅sistema (idish) ni butun hajm bòylab bir tekis qizdirishda
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Sr, Cr, Ni, Fe3+, Co3+, Fe2+ ...lardagi s va d elektronlar soni teng bo'lganlarini toping?
✅Fe2+, Co3+, Ni, Sr
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✅Fe2+, Co3+, Ni, Sr
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Quyidagi fikrlardan qaysi to'g'ri...
✅A) -COOH dagi C ga sistemak bo'yicha 1-raqam beriladi
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✅A) -COOH dagi C ga sistemak bo'yicha 1-raqam beriladi
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Biuret reaksiyasi oqsildagi H-bog'larni aniqlaydimi?
✅ peptid (-CO-NH-) bog'ini aniqlaydi
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✅ peptid (-CO-NH-) bog'ini aniqlaydi
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dikarbon kislotani eng kichik gomologi nomi?
✅oksalat (shovul) kislota
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Moddalarning bosim va temp.ga bog'liq holda agregat holatlarning bir-biriga to'g'ri o'tgan grafikni aniqlang.
✅Javobni kitobimdan topasiz
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300gr 4,5% KNO3 eritmasi 13,4 A tok kuchi bilan elektroliz qilindi. Natijada KNO3ning 30°dagi toʻyingan eritmasi olindi. Eritma necha soat davomida elektroliz qilingan. S=45
🔣 5️⃣ 7️⃣ izoh: oxirgi hisobda texnik yanglishib 171 chiqarilgan
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7, 13, 15 elementlarni elektromanfiyligi ortish tartibida joylashtiring?
✅13,15,7
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✅13,15,7
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