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Does the solubility of the solute increase or decrease if a bottle of soda (solute is CO2 gas) is placed in the refrigerator instead of in the pantry at room at room temperature?
If the heating is carried out in a container fitted with a piston that was initially resting on the solid, calculate the work done by the piston on the surroundings during the complete decomposition. The pressure of the surroundings is 0.998 bar.
The mechanism by which these compounds kill insects and people is unknown. D. These compounds kill insects and people by stimulating acetylcholinesterase, an enzyme of the nervous system.
A nugget of pure gold of 4.90 grams absorbed heat of 270 Joules. determine the final temperature of the Au if the initial temperature = 22.0°C? specific heat of Au =0.129 J/(g·°C).
Consider: 2 B5H9 (g) + 12 O2 (g) ? 5 B2O3 (g) + 9 H2O (g) ?H?reaction= - 8687 kJ. What is the enthalpy change when 0.2500 moles of B5H9 are combusted
A piece of metal of mass 22 g at 92C is placed in a calorimeter containing 53.7 g of water at 21C. The final temperature of the mixture is 55.3C. What is the specific heat capacity of the metal?
Provide a structure for the following compound: UV spectrum: ?max = 272 nm (? = 39,500); EI mass spectrum: m/z = 129 (molecular ion and base peak); IR: 2200, 970 cm-1;
A gaseous mixture of O2 and N2 contains 37.8% nitrogen by mass. what is the partial pressure of oxygen in the mixture if the total pressure is 325 mmHg
antimony reacts with sulfur according to this given reaction 2sbs 3ss rarr sb2s3s determine what is the mass percent
Radio waves travel at the speed of light, which is 3.00 x 108 m/s. How many kilometers will radio messages to outerspace travel in exactly one year?
Gaseous [Br2] decomposes at 573 K Br2(g) 2 Br(g) In a 1.26-L flask 0.086 mol of Br2 are placed and heated to 573 K. Measurements determine that Br2 is 3.7 % dissociated at this temperature. Explain what is the value of Kc for this reaction
Compute the pH of a buffer solution that contains 0.0020 M carbonic acid and 0.025 M hydrogen carbonate ion. Explain the Ka for carbonic acid is 4.17 x 10(-7).
Calcium carbide, CaC2, reacts with water to form acetylene. CaC2(s) + 2 H2O(l) C2H2(g) + Ca(OH)2(s) How many grams of water are needed to react with 473 g of calcium carbide?
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