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Question- Mixing together solutions of a group 2 metal chloride and sodium carbonate results in the formation of a white precipitate. A 25.00 ml aliquot of 0.3000 M HCl was added to 0.250 grams of the solid accompanied by fizzing and the dissolving of the solid. Back titration of the excess HCl required 24.80 ml of 0.2000 M NaOH solution. Calculate the molecular mass of the metal carbonate and give the likely identity of the metal.
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As gas expands from 1.00 L to 2.50 L against constant pressure of 820 torr. Calculate the change in internal energy for the gas, if 120 J of heat is transferred to the gas during the expansion.
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Concerns over the harmful effects of chlorofluorocarbon on stratospheric ozone motivated a search for new refrigerants. One alternative was 2,2-dichloro-1,1-trifluoroethane (''refrigerant 123''). Estimate the temperature change that would accompany..
A hiker caught in a thunderstorm loses heat when her clothing becomes wet. She is packing emergency rations that, if completely metabolized, will release 30 kJ of heat per gram of rations consumed.
What is the expected theoretical yeild of aspirin based on exactly 1 g of salicylic acid and 3.50 mL of Acetic Anhydride (Density = 1.082 mL^-1)
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