FEFU Legal studies Pavlenko Natal_a Eduardovna Computer Exam - Legal studies - Zacteno 1. Pravootnosenie: ponatie, sostav, vidy. 2. Ponatie braka v...
591. Compare the degree of salt hydrolysis and pH of the medium in 0.1 M and 0.001 M solutions of potassium cyanide.
In three weights of alloyed steel, vanadium with dichlorochromotropic acid (DCCA) was determined by the spectrophotometric method; the following...
From the electron microscopic analysis of a sample of silver nanoparticles, the distribution of the number of particles N over the diameter d is...
Calculate the repulsion energy U of spherical nanoparticles with radius r in an aqueous electrolyte solution with concentration c at the diffuse...
The root-mean-square shift of spherical silica hydrosol nanoparticles over a time of 4 s is 12 µm. Calculate the particle radius if the viscosity of...
8. What mass of a substance containing 60% NaCl and 37% KCl should be taken for analysis so that after adding 40.000 ml of 0.1000 M AgNO3, excess...
10. What mass of mercury was contained in 250.0 ml of the solution if, after adding 0.01000 M EDTA to 50.00 ml of it, the excess of the latter was...
13. A weighing of BaCl2 weighing 6.700 g was dissolved in a volumetric flask with a capacity of 100.0 ml. For titration of 25.00 ml of solution...
Choose among the proposed complex compounds cationic complexes. Name the selected complex compounds, determine the charge of the complexing agent...
6. A solution whose percentage concentration is ω has a density ρ. Determine the molarity and normality of the solution. Numerical values of ω and p...
25. Solutions of 2 electrolytes are considered, the molar concentration of each of which is equal to See. Determine the strength of electrolytes and...
53. The reaction C (graphite) 2F2 (g) \u003d CF2 (g) is given. Write down the kinetic equation of the reaction and determine its theoretical order...
73. For a reversible heterogeneous reaction given in the second task of your option, write down the expressions for the equilibrium constants Ks and...
93. For a reversible heterogeneous reaction expressed by the thermochemical equation V2O5(c) 5H2(g)<=>2V(c) 5H2O(g); ΔH>0, determine the direction of...
96. The molecule B2 and molecular ions are considered: B2 and B2-. Using the MO method, explain the formation of a chemical bond in a molecule and in...
267. During the dissociation of orthosilicic acid, 5 processes can be considered H4SiO4 = 4H SiO44-, ΔH(a) H4SiO4 = H H3SiO4-, ΔH(b) H3SiO4- = H...
1. Calculate the change in enthalpy and internal energy of the standard reaction at the specified temperature. 4NH3 3O2 = 2N2 6H2O(g) temperature 373K
3. Determine the theoretical yield of ethylene chloride by the reaction C2H2 HCl(g)=C2H3Cl(g) proceeding at T=700K in a reactor with a volume of 0.1...
4. Calculate the mass fraction of sodium hydroxide and hydroxylamine in the solution, if when titrating 10.0 ml of solution (ρ = 1.0 g/ml) the volume...
49. 500 ml of solution contains 0.377 g of H2C2O4 • 2H2O. For this solution, calculate the normality according to the reaction occurring in an...
Plot the sedimentation curve, calculate and plot the integral and differential distribution curves for a suspension of Glukhovskaya clay in water...
4. How many unpaired electrons are contained in the electron shell of atoms of zinc and silicon elements?
1. 10 ml of a solution of carboxylic acid in benzene was added to 100 ml of a solution containing 1⋅10-3 mol/l Cu2+, and the pH was adjusted to 4, at...
134. The decomposition reaction of hydrogen iodine proceeds according to the equation 2HI(g)→H2(g)+I2(g) with a rate constant of 1.85*10-4 l/mol*s...