Kimyoviy bog‘lanish

03-10son-8.
277. Suvsiz kaliy gidroksid tayyorlash uchun 16,8 g kaliy oksid 92% li o‘yuvchi kaliyning qanday miqdorida (g) eritilishi zarur?
A) 15,0 B) 50,0 C) 32,0 D) 40,2 E) 55,0
03-10son-9.
278. Suvsiz sulfat kislota tayyorlash uchun 16 g sulfat angidrid 90% li sulfat kislota eritmasining qanday miqdorida (g) eritilishi zarur?
A) 34 B) 26 C) 46 D) 36 E) 25
03-10son-10.
279. Suvsiz ortofosfat kislota tayyorlash uchun 14,2 g R₂O₅ qanday massadagi (g) 96% li ortofosfat kislota eritmasida eritilishi zarur?
A) 196 B) 269 C) 169 D) 351 E) 135
03-10son-11.
280. 88% li 750 g sirka kislota eritmasini tayyorlash uchun sirka angidrid va 25% li sirka kislota eritmasidan qanday miqdorda (g) olish kerakligini aniqlang.
A) 510: 240 B) 1010: 240 C) 510: 480
D) 255: 240 E) 255: 480
03-7son-71.
281. Massa ulushi 0,65 bo‘lgan 700 g sirka kislota eritmasini tayyorlash uchun sirka angidrid va 20% li sirka kislota eritmasidan qanday miqdorda (g) olish kerak?
A) 85,55 va 185,55 B) 377,26 va 322,74
C) 323,74 va 377,26 D) 85,55 va 377,26
E) 322,74 va 377,26
03-9son-31.
282. 98% li H₂SO₄ eritmasidan 1200 g tayyorlash uchun sulfat angidrid va 32% li sulfat kislota eritmasidan qanday miqdorda (g) olish kerak?
A) 269,39: 369,39 B) 875,14: 324,86
C) 245,66: 355,66 D) 160,50: 940,50
E) 324,86: 800,00
03-9son-32.
283. 56% li sulfit kislota eritmasidan 650 g tayyorlash uchun sulfit angidrid va 14% li sulfit kislota eritmasidan qancha miqdorda (g) olish zarur?
A) 58,33: 158,33 B) 410,59: 238,47
C) 239,47: 410,59 D) 319,59: 23,947
E) 139,47: 310,59
03-9son-33.
284. 20% li karbonat kislota eritmasidan 500 g tayyorlash uchun karbonat angidrid va 12% li karbonat kislota eritmalaridan qanday miqdorda (g) olish kerak?
A) 33,33: 34,56 B) 133,3: 375 C) 375: 125
D) 125: 375 E) 31: 469
03-9son-34.
285. O‘yuvchi natriyning 60% li eritmasidan 600 g tayyorlash uchun uning 10% li eritmasidan va natriy oksididan qancha miqdorda (g) olish kerak?
A) 72,46: 172,46 B) 347,9: 72,46
C) 252,09: 347,9 D) 347,9: 252,09
E) 255,6: 341,9
03-9son-35.
286. O‘yuvchi kaliyning 66% li eritmasidan 750 g tayyorlash uchun uning 18% li eritmasidan va kaliy oksididan qancha miqdorda (g) olish zarur?
A) 349,5:300,49 B) 400,49:349,5 C) 187,27: 200,4
D) 394: 356 E) 500,4: 600,6
03-9son-36.
287. 100% li sulfat kislotada erigan sulfat angidridning 20% li eritmasini hosil qilish uchun 1 kg massadagi 94,6% li sulfat kislotada qanday massadagi sulfat angidridni eritish kerak?
A) 205,6 B) 488 C) 550 D) 240 E) 310
01-3son-104.
288. 100% li sulfat kislotaning 300 g miqdorida 15% li sulfat angidrid eritmasini hosil qilish uchun talab etiladigan oltingugurt massasini (g) hisoblang.
A) 18 B) 83,3 C) 36 D) 73 E) 45