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The figure below is a heat curve for an unknown outerspace substance discovered by the Mars rover. By understanding the heat curve, scientists can make inferences about the composition of the planet. What is the temperature of fusion, Tfusion, and vaporization, Tvapor, for this unknown substance? Note that the units are graded. For a sample of 75.4 g of this substance with a specific heat of 54.8 J/kg·°C, how much heat is added to the substance if the temperature is to change from 180.0°C to 232.0°C?
Calculate the heat evolved per mole on combustion of each substance to yield {rm CO_2}(g) and {rm H_2O}(g).
calculate the concentration of a monotropic basic solution given that 99.3ml of the basic solution is neutralized by
Aluminum has a specific heat of 0.900 J/g·°C. How much energy is required to raise the temperature of 160. g of aluminum from 20.0°C to 183.0°C?
The density of the unknown is 0.714g/mL. The Kf of nitrobenzene is 6.87 ^0C/m. Calculate the molar mass of the unknown.
At 80C the vapor pressures of pure liquids X, Y, and Z are 385, 190, and 66 mmHg respectively. what pressure must be exerted on the surface of a solution containing one mole of X, three moles of Y, and two moles of Z for boiling to begin at 80C
Is the reaction between hydrochloric acid and sodium bicarbonate exothermic or endothermic?
What mass of precipitate forms when 124.5 mL of 0.660 M NaOH is added to 517 mL of a solution that contains 10.9 g aluminum sulfate per liter?
Diethyl ether comprise a vapor pressure of 401 mmHg (torr) at 180C as well as its molar heat of evaporation is 26.0 kJ/mol define what is its vapor pressure at 32.00C R = 8.314J/K.mol
Global warming refers to the rise in average global temperature due to the increased concentration of certain gases, called greenhouse gases, in our atmosphere.
A mixture of 0.10 mol of NO, 0.050 mol of H2, and 0.10 mol of H2O is placed in a 1.0- L vessel at 300 K . The following equilibrium is established:
A mixture of gases containing 0.40 mol of SO2 and 0.20 mol of O2 in a 4.0L flask reacts to form SO3. If the temperature is 25oC, what is the pressure in the flask after the reaction is complete
When calculating the density of your regularly shaped object, which measurement will limit your final result?
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