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To what temperature must a substance be heated so that its thermal energy is about 9 kJ/mol? Express your answer to the nearest degree.
A mixture is prepared by adding 22.7 mL of 0.157 M Na3PO4 to 31.2 mL of 0.277 M Ca(NO3)2. (a) What mass of Ca3(PO4)2 will be formed? (b) What will be the concentrations of each of the ions in the mixture after reaction?
A system conducts 238 cal of heat to the surroundings while delivering 331 cal of work. what is the change in internal energy of the system (in cal).
A gas sample in a piston assembly expands, doing 588 kJ of work on its surroundings at the same time that 372 kJ heat is added to the gas.
Build another molecule of dichloromethane. Is it identical with the first? Why or why not? How many different isomers of dichloromethane, CH2Cl2, are there?
Nitrogen gas reacts with hydrogen gas to produce ammonia by the following equation. N2(g) + 3H2(g) ---> 2NH3(g) A: If you have 3.98g of H2, how many grams of NH3 can be produced?
Calculate the amount of heat (in kj) required to heat 2.75 kg of water from 13.20 degrees celsius to 46.32 degrees celsius
0.75 g of hydrogen chloride (HCl) is dissolved in water to make 7.0 L of solution. What is the pH of the resulting hydrochloric acid solution.
determining the difference between vinylic & allylic hydrogens in a Cyclohexene, how many of each, what determines it?
In the concentration range of 500 to 2000 ppm of U, there is a linear relationship between absorbance at 351.5 nm and concentration. At lower concentrations the relationship is nonlinear unless about 2000 ppm of an alkali metal salt is introduced ..
calculate the pressure difference in kPa between the points when (a) water is flowing through the pipeline, and (b) also when air at atmospheric pressure and 20oC with a density of 1.20 kg/m3 is flowing in the pipeline.
How much energy is required to vaprorize 150 ml of c6h6 at 25 c? the density of c6h6 is 0.87 g/ml and the enthalpy of vaporization is 30.8 kj/mol
When adjusted for any changes in and with temperature, the standard free energy change at 2400 is equal to . Calculate the equilibrium constant at 2400.
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