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In an experiment, 99.0 g of aluminum (with a specific heat of 900 J/kg·K) at 93.0°C is mixed with 88.0 g of water (with a specific heat of 4186 J/kg·K) at 32.0°C, with the mixture thermally isolated.
(a) What is the equilibrium temperature, in Celsius? What are the entropy changes of
(b) the aluminum,
(c) the water, and
(d) the aluminum-water system?
Nuclides below the valley of stability can become more stable through which of the following processes
Upon decomposition one sample of magnesium fluoride produced 1.66 kg of magnesium and 2.57 kg of fluorine. A second sample produced 1.38 kg of magnesium. How much fluorine did the second sample produce
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if 6.73 g of Na2CO3 is dissolved in enough water to make 250 ml of solution, what is the molarity of the sodiam carbonate?
Lead and iron are common alloying elements found in brass. Would the presence of these elements complicate the analysis of brass
Explain why the rates of diffusion of nitrogen gas and carbon monoxide are almost identical at the same temperature.
The solubility of 1-hexanol in water is 0.60 g per 100 g of water at 25 degrees C. What is the maximum amount of 1-hexanol that will dissolve in 7.9 g of water at 25 degrees C
Investigators have reported experimental observation of the He2 ‘complex' (i.e., a very weakly bonded molecule). The fact that the observation required temperatures in the neighborhood of 1 mK is consistant with computational studies that hcDe for..
What is the maximum mass of sucralose (C12H19Cl3O8) you can add to 2.50 kg of pure water and still have the solution freeze? Assume that sucralose is a molecular solid and does not ionize when it dissolves in water.
A solution is made by combining 15.0 mL of 18.0 M acetic acid with 5.50 g of sodium acetate and diluting to a total volume of 1.50 L. Calculate the pH of the solution.
If the average speed of an oxygen molecule is 4.43 multiplied by 104 cm/s at 25°C, what is the average speed of a CO2 molecule at the same temperature?
A sample of nitrogen gas, N2 is collecyed in a 100 mL container at a pressure of 688 mm Hg and a temperature of 565 degress celsius. How many grams of nitrogen gas are present in this sample.
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