https://store.steampowered.com/app/1065670/4004022/ STEAM KEY REGION FREE GLOBAL In the year 2040 you and the 12 billion inhabitants of the Earth...
For the given two beam schemes, it is required to write the expressions Q and M for each section in a general form, and plot the Q and M plots; find...
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Task 4 Geometric characteristics. For a given cross-section, consisting of a channel and an isosceles angle, or from an I-beam and an isosceles...
1. Determine the pressure of water vapor over a solution containing 0.8 mol of ethylene glycol C2H4 (OH) 2 in 900 ml of water at a temperature of 50...
2. In a 0.06 M solution of a weak binary electrolyte, 0.055 mol/l of its molecules remained undissociated. Calculate the degree of dissociation of...
2. For complete neutralization of 200 g of a 10% barium hydroxide solution, 25 ml of a hydrochloric acid solution were required. Find the normal and...
3. Make a micelle formula for the sol obtained by the interaction of an excess solution of iron (II) nitrate with a solution of potassium sulfide...
4. There are three solutions with the same concentration - 0.1 mol / kg - potassium chloride, urea and magnesium chloride. Which one has the highest...
2. Determine the consumption coefficient of water vapor during the distillation of nitrobenzene with water vapor, if a mixture of nitrobenzene and...
3. Express the composition of the resulting solution in terms of mass%, molality, molar concentration, mole fractions, molar concentration of the...
5. Determine the density of the Fe-Sn melt containing 70 wt.% Sn if the partial molar volumes of iron and tin are 6.6 and 19.7 cm3/mol, respectively...
289. Consider the cathodic and anode processes in the electrolysis of aqueous solutions of matter by inert electrodes. Calculate the mass and (and)...
3. The test tubes contain solutions of glycerin and phenol. Write reaction equations to identify these substances.
2. What concentration should aqueous solutions of urea and fructose have in order for the vapor pressure of these solutions at 93 C to differ from...
71. How many milliliters of 0.2 M HCl must be added to 50 ml of 0.1 M Na2CO3 to obtain a solution with a pH of 10.5?
68. The most effective way to neutralize contaminated wastewater from chemical enterprises is to treat them with substances that precipitate harmful...
8. Copper does not displace hydrogen from hydrochloric and dilute sulfuric acids. Why? If a copper plate dipped in acid is touched with zinc, then a...
4. How long will it take for saponification of ethyl acetyl ether by 90% with sodium hydroxide if the initial concentrations of ether solutions are...
314. What is disjoining pressure and what are its causes?
2. MgCl2(g) NaOH; core Mg(OH)2 electrolyte: KCl, Zn(CH3COO)2;AlCl3
8. Based on the change in benzene adsorption, determine the surface of the adsorbent (T=293K, S0=49*10-20 m2). P/PS 0.04 0.08 0.16 0.22 0.27 A*102...
1.1 Construct a chemical galvanic circuit with transfer, consisting of an electrode of the first kind and an electrode of the second kind. Determine...
8. How much and what kind of metal corroded in a Cu-Ni alloy at room temperature in a solution with pH=10, if 160 ml of oxygen (n.u.) was absorbed...
3D solid model of part "Socket" (15.03.05.000.000.022) and its associatively linked 2D drawing in the KOMPAS-3D software.