Glinka Problem 428
428. 666 g of KOH are dissolved in 1 kg of water; the density of the solution is 1.395 g/ml. Find: a) mass fraction of KOH; b) molarity; c) molality;...
Solution to task 428 from Chertov's for extramural stud
428. A solid cylinder with a radius of R = 4 cm and a height of h = 15 cm carries a charge uniformly distributed over the volume (ρ = 0.1 µC / m3)...
FEFU WEBDidactor Civil law - 2 questions #428
FEFU Civil law Pavlenko Natal_a Eduardovna Computer Exam - Civil law - Otlicno 1. Predstavitel_stvo bez polnomocij 2. Den_gi i zennye bumagi, kak...
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94. Solving a chemistry problem
The content of the main active ingredient ranitidine in the drug Rantak solution for injection 25 mg / ml is determined by HPLC, measuring the peak...
94. Solving a chemistry problem
10. A mixture of salicylic acid (I) and acetylsalicylic acid (II) was divided on plates "Silufol"; we obtain the following results. The distances...
84. Solving a chemistry problem
27. Write the expressions for the equilibrium constants (Kp) for the systems below and indicate the shift in equilibrium when conditions change...
84. Solving a chemistry problem
33. a) How many grams of sodium hydrosulfite should be taken to prepare 15 liters of a 5% solution (ρ = 1.037 g / ml)? What is the normal...
84. Solving a chemistry problem
43. Write the following definitions: electrolytes, electrolytic dissociation and degree of dissociation (α). Which electrolytes, according to the...
84. Solving a chemistry problem
53. Write the reaction equations for the hydrolysis of salts of all possible stages in molecular and ionic form, indicate the acidity of the medium...
84. Solving a chemistry problem
64. Redox reactions are widely used to determine food quality. Write equations for the following redox reactions using the electron balance method...
84. Solving a chemistry problem
74. Platinum dissolves in "aqua regia" with the formation of a complex compound H2[PtCl6]. Write an equation for this reaction, name the complex...
54. Solving a chemistry problem
28. What cations will be in solution and in the precipitate and in the form of what compounds, if a mixture of cations of five analytical groups is...
44. Solving a chemistry problem
2. What molar concentration of KOH should be created in a saturated solution above the Mg(OH)2 precipitate so that no more than 0.06 mg of the...
34. Solving a chemistry problem
78. The rate constant of the reaction HCOH H2O2 \u003d HCOOH H2O at 60 C is 0.7544 l / mol • h. How many g of formic acid is formed 1 hour after the...
24. Solving a chemistry problem
4. Write the molecular and ionic equations for the hydrolysis of beryllium chloride and beryllium chloride in the presence of potassium carbonate...
14. Solving a chemistry problem
142. What is the molar concentration of the equivalent of a 30% NaOH solution with a density of 1.328 g/cm3? To 1 liter of this solution was added 5...
4. Solving a chemistry problem
8. Is it possible to prepare 530 ml of a 0.02M solution of phosphoric acid from 250 ml of its 5% solution. Explain your answer
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