Grinyar reaktiviga karbon kislota taβsir ettirildi (etil magniy yodid+sirka kislota 12g)
a) hosil boβlgan organik modda massasi
b) hosil boβlgan organik moddani gidrolizlangandan soβng hosil boβlgan organik moddadagi vodorod atomlari soni
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a) hosil boβlgan organik modda massasi
b) hosil boβlgan organik moddani gidrolizlangandan soβng hosil boβlgan organik moddadagi vodorod atomlari soni
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232g Temir(II) -nitrat va mis aralashmasi ochiq havoda qizdirilganda massa oβzgarmadi.
a) dastlabki tuz massasi
b) hosil boβlgan mis(II)oksid massasi
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a) dastlabki tuz massasi
b) hosil boβlgan mis(II)oksid massasi
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Litiy bn natriydan iborat aralashma 5mol kislorodda yondirildi. Hosil boβlgan qattiq moddalar CO2 bn reaksiyaga kirishdi. Sarflangan CO2 massasi dastlabki aralashma massasidan 2 marta koβp.
a) Hosil boβlgan tuz necha mol bariy xlorid bn reaksiyaga kirishadi
b) dastlabki aralashma massasi
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a) Hosil boβlgan tuz necha mol bariy xlorid bn reaksiyaga kirishadi
b) dastlabki aralashma massasi
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Metan bilan siklopropan ning H/C = 2,5 ga teng. Shu moddalarning 1 molini yonishi uchun necha mol O2 sarflanadi?
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Ushbu oksid odatdagi sharoitda qattiq bo'lib, ishqor bilan reaksiyaga kirishadi. Kuchli kislotalar bilan kirishmaydi. Boksit va nefelin tarkibiga kiradi bu qaysi element?
β Al
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β Al
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PbO2+ Mn(+2) + H(+) =Pb(+2) + MnO4(-) + H2O oβng tomon va chap tomondagi Koeffitsiyentlar yigβindisini toping?
β mustaqil ishlang
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β mustaqil ishlang
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Metanga nisbatan zichligi 1,875 boβlgan CO va nomaβlum gazdan iborat aralashmada gazlarning massalari teng. Nomaβlum gazni toping?
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X befarq oksid gaz va propen teng mol nisbatda olingan aralashmaning He ga nisbatan zichligi 9 ga teng boβlsa, X gaz ni toping
A) SO2
B) NOβ
C) N2O
D) CO
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A) SO2
B) NOβ
C) N2O
D) CO
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300 mol O2 CO bn reaksiyaga kirishdi. Hosil bo'lgan CO2 bilan ortib qolgan O2 teng bΓ²lsa, hosil bo'lgan gazni miqdorini aniqlang?
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Savol: (chin) Eritmaga xos ma'lumotni toping.
1) tarkibi bir xil moddadan iborat 2) fizik tasirlarda tarkibiy qismga ajratb bo'lmaydi 3) hosil bo'lishida issiqlik chiqishi yoki yutilishi mumkin 4) erigan modda qoΚ»shilganda hajm oΚ»zgaradi 5) butun hajm bΓ²ylab bir tekis tarqaladi
β 3,5
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1) tarkibi bir xil moddadan iborat 2) fizik tasirlarda tarkibiy qismga ajratb bo'lmaydi 3) hosil bo'lishida issiqlik chiqishi yoki yutilishi mumkin 4) erigan modda qoΚ»shilganda hajm oΚ»zgaradi 5) butun hajm bΓ²ylab bir tekis tarqaladi
β 3,5
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Quyidagilardan qaysilarining suvli eritmalari pH qiymati 7 dan kichik
A) suv va rux nitrat
B)β aluminiy xlorid va sirka kislota
C) kaliy atsetat va K2S
D) kaliy sulfit va nimadir
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A) suv va rux nitrat
B)β aluminiy xlorid va sirka kislota
C) kaliy atsetat va K2S
D) kaliy sulfit va nimadir
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4 ta probirka bor. Propan kislota, propanal, propandiol-1,2, propanol-1. 3-probirkadagi moddani 1- va 4-probirkadagi moddalarni oksidlab olish mumkin. 2-probirka Cu(OH)2 bilan ko'k rangli eritma hosil qiladi. 1-probirka Cu(OH)2 bilan qizil chokma hosil qiladi. 3-probirkadagi moddani aniqlang
A) propanal
B)β propan kislota
C) propandiol-1,2
D) propanol-1
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A) propanal
B)β propan kislota
C) propandiol-1,2
D) propanol-1
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MgSO4 ning 840 gr 40%li eritmasi 50Β°C gacha sovutildi. 648 gr to'yingan eritma olindi. MgSO4 *xH2O cho'kmaga tushdi. (S= 50 t=50 Β°C)
A) x ni aniqlang
B) kristalogidrat tarkibidagi kislorod atomlarining molini aniqlang.
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A) x ni aniqlang
B) kristalogidrat tarkibidagi kislorod atomlarining molini aniqlang.
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Kremniy va uglerodga natriy gidroksidning 200 gr 20% li eritmasi bilan reaksiyaga kirishdi. Erimagan qoldiq konsentrlangan H2SO4 bn reaksiyaga kirishdi. Ikkala jarayonda ham bir xil hajm gaz ajraldi. Dastlabki metalmaslarni umumiy massasini aniqlang.
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nS. 8
βββ=-----
nO. 19
Bo'lgan oltingugurt di- va trioksidi mavjud. Ushbu aralashma KMnO4 ning 150g 31.6% li eritmasi bilan reaksiyaga kirishdi. (dioksid to'liq oksidlangan).
A) eritmadagi hosil bo'lgan jami sulfat ionini molini aniqlang
B) dastlabki aralashma massasini aniqlang.
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βββ=-----
nO. 19
Bo'lgan oltingugurt di- va trioksidi mavjud. Ushbu aralashma KMnO4 ning 150g 31.6% li eritmasi bilan reaksiyaga kirishdi. (dioksid to'liq oksidlangan).
A) eritmadagi hosil bo'lgan jami sulfat ionini molini aniqlang
B) dastlabki aralashma massasini aniqlang.
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2:1 mol nisbat olingan KMnO4 va MnO2 aralashmasiga mol miqdordagi HCl eritmasi ta'sir ettirildi. Natijada 30,6NA ta elektron tutgan gaz ajraldi.
A) hosil boβlgan Mn li tuz massasi
B) dastlabki MnO2 massasini
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A) hosil boβlgan Mn li tuz massasi
B) dastlabki MnO2 massasini
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X g formaldigid Ca(OH)2 bilan qizdirilganda reaksiyadan olingan mahsulot kumush ko'zgu reaksiyasiga kirishib Y g metall hosil bo'ldi. Dastlabki X g formaldegid mis ko'zguga kirishganda 432g qizil cho'kma hosil bo'ladi. Y ni toping?
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Hurmatli ustozlar, aziz o'quvchilar va ayniqsa yoshbolali hamda qaynona-qaynota xizmatidagi qadrli ayollar!!! Yoz davomida ta'tilni yanada maroqli va foydali o'tkazishni, keyingi o'quv yiligacha ilmiy salohiyat va mantiqiy fikrlash qobiliyatingizni oshirishni va eng asosiysi yozning issiq chillasida uydan chiqmasdan oilangiz bag'rida bo'lgan holda o'z ustingizda qat'iy ishlash rejangizda bormi
...to'liq uch oylik kurs davomida siz 50% chegirma narxda qanday bilimlarni o'zlashtirasiz va bazalarni qo'lga kiritasiz:
1οΈβ£ Zamonaviy animatsion shaklda mavzuma mavzu batartib ijod qilingan to'liq va tugal videodarslar:
2οΈβ£ Olingan nazariy bilimlardan foydalangan holda amaliy qo'llay olish uchun test-topshiriqlar bazasi:
3οΈβ£ Test-topshiriqlar bazalarini tahlil qilishda to'g'ri mantiqiy algoritm tuza olish, nazariy bilimlarni qo'llay olish va vaqtdan unumli foydalangan holda to'liq yechim tahlillari:
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