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When taking a boiling point of a compound, why is the micro boiling point determined at the point when the last bubble has left the bottom of the bell and the liquid begins to rise in the bell
The temperature of 55.6 grams of a material decreases by 14.8 degrees C when it loses 3080 J of heat. What is its specific heat?
What mass of natural gas {rm{(CH}}_4 ) must you burn to emit 268 kJ of heat?
lightbulb is visible light and that the average wavelength og the light is 550 nm, how many photons are emitted by the lightbuld each second?
The heat of fusion of ice (the heat associated with ice melting) is 6.0 kJ/mol. Find the temperature of the coffee after the ice melts.
sodium chloride dissolved in 225 g of water has a density of 1.98g/ml. Calculate the mass percentage of sodium chloride
By mistake, a worker at an electroplating shop mixes a small amount of sulfuric acid into a large tank of wastewater containing sodium cyanide. The reaction produces a toxic gas, hydrogen cyanide, as shown below:
The atomic masses of ^10B and ^11B are 10.0129 amu and 11.0093 amu., respectively. calculate the natural abundances of these two isotopes. The average atomic mass of B is 10.811 anu
if the syinge colume had been incorrectly read, giving a calculated system volume of 25.6 mL, what would have been the percent error in the calculated value of R?
Calculate the equilibrium concentration of Cl2O(g) if 1.0 g of H2O(g) and 2.0 g of Cl2O(g) are mixed in a 1.0-liter flask.
The excess I3- was titrated with 50.00 mL of a 0.02000 M Na2S2O3 solution. What was the mass percent of arsenic trichloride in the original sample?
given that Go = 5.02 kcal/mol for the complete reaction catalyzed by isocitrate dehydrogenase and that Go = 4.71 kcal/mol for the nonoxidative decarboxylation of oxalosuccinate, oxalosuccinate + H+ ----> CO2 + a-ketoglutartate.
What is the absolute pressure in a lake 90.00 meters under water (? = 1.00 g/mL) when the atmospheric pressure is 101.325 kPa?
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