The successful launch of my country's "Shenzhou" series of manned spacecraft marks the realization of "the thousand-year dream of the descendants of Yan and Huang to fly into the sky." Spacecraft requ

The successful launch of my country's "Shenzhou" series of manned spacecraft marks the realization of "the thousand-year dream of the descendants of Yan and Huang to fly into the sky." Spacecraft require propellant for liftoff

(1) The N element in nitrate is at the highest price and can be used as an oxidant, so A is ammonium nitrate; the hydrolysis of ammonium root shows acidity: NH4 H2O?H NH3?H2O, so the answer is: NH4NO3; NH4 H2O?H NH3?H2O;

(2) Common liquid compounds generally composed of elements in C, H, O, and N, and a common stable element is water and nitrogen, B and Propylene They are N2H4 and H2O2 respectively, both of which are 18-electron molecules. The chemical equation of this reaction is: N2H4 2H2O2=N2 4 H2O; the reddish-brown gas is nitrogen dioxide. 2molN2H4 can release 2Q?kJ when it completely reacts with nitrogen dioxide at room temperature. Heat, the thermochemical equation of this reaction: 2N2H4 (l) 2N2O4 (g) = 3N2 (g) 4 H2O (l) △H = -2QkJ/mol, so the answer is: N2H4 2H2O2 = N2 4 H2O; 2N2H4 (l) 2N2O4 (g) = 3N2 (g) 4 H2O (l) △H = -2QkJ/mol;

(3) The propellant is mainly composed of flammable agents and oxidants. Petroleum is the flammable agent, liquid fluorine and Ammonium perchlorate is an oxidizing agent, and urea is neither a flammable agent nor an oxidizing agent, so the answer is: B;

(4) Nitrogen is 0.2 mol and its mass is 5.6 g. CO2 is 0.1mol, and its mass is 4.4g. According to the law of conservation of mass, the mass of oxygen is 19.6g-5.6g-4.4g=9.6g, and the amount of substance is 0.3mol, so the volume is 6.72L. Then the ratio of the number of C, N, and O atoms in the molecule is 1:4:8, so the chemical formula is C(NO2)4, so the answer is: C(NO2)4;

(5) The inorganic salt is ammonium carbonate or ammonium bicarbonate or a mixture of the two. Both are easy to decompose, so they can be judged by the mass of the decomposition products. For example, weigh the mass of a solid sample mg, heat the sample, pass the gas into a sufficient amount of clear lime water, measure the mass of the precipitate ng, and obtain the final result through the calculation of m and n.

So The answer is: The inorganic salt may be (NH4)2CO3 or NH4HCO3 or a mixture of the two. Weigh the mass of the solid sample in mg, heat the sample, and pass the gas into a sufficient amount of clarified lime water to measure the mass of the precipitate in ng. The final result is obtained through the calculation of m and n.