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A researcher studying the nutritional value of a new candy places a 4.90-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.54 °C. If the heat capacity of the calorimeter is 32.30 kJ·K-1, how many nutritional Calories are there per gram of the candy?
Find the molarity of each ion present after mixing 27 mL of 0.25M HNO3 with 36.0ml of 0.42 M Ca(NO3)
A solution is 0.43 M Sr(OH)2. What are the concentrations of H3O+ and OH ‾ in this solution?
Calculate the molar heat of combustion of fructose using the data from this experiment. Since this experiment is carried out under conditions of constant volume, we are measuring ?E. Your answer should be in kJ/mol and entered to 3 sig. fig.
A metal, M, was converted to the chloride, MCl2. Then a solution of the chloride was treated with silver nitrate to give silver chloride crystals, which were filtered from the solution.
Calculate the standard enthalpy of formation of solid diboron trioxide (B2O3) using the following thermochemical information
Compute the molar concentrations of these gases under conditions typical of (a) the mid-latitude troposphere (10°C and 1.0 atm) and (b) the Antarctic stratosphere (200 K and 0.050 atm).
Fermentation of glucose produces ethyl alcohol and carbon dioxide; C6H12O6(l) ? 2 C2H5OH(l) + 2 CO2(g) What is ?H°rxn (in kilojoules) if 385.3 mL of CO2 was collected over water at 20.00°C and 761.2 mm Hg
calculate the number of moles of gaseous n2 contained in a sample of 300 ml of gas saturated with water vapour at 25
suppose the absorbance of an iodine sample changes from 0.6 to 0.7when the iodine concentration in it is increased from
if phosphoric acid is pour into an aluminum can what would thereaction look like? we did this in lab to see if aluminum
Write a "mechanism" for the formation of phenacetin from acetaminophen and ethyliodide.
A sample of chlorine gas in confinedin a 5.9L container at 220. torr and 27 degrees Celsius. How many moles of gas are present in the sample?
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