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A student heated 75.0mL of water in an aluminum container using the alcohol burner filled with methanol (CH3OH). The mass of the aluminum container was 44.5g. The initial temperature of the water was 16.5°C and the final temperature was 23.9°C. The initial mass of the alcohol burner was 113.54g and the final mass was 112.97g. Calculate the molar heat of the combustion of methanol. The specific heat capacities are C(aluminum)= 0.900J.g°C and C(H20) = 4.18J.g°C and the molar mass of methanol= 32.05g/mol.
Explain how use of 3 M HCl(aq) could separate it from the other components. To do so: show how acid would change the molecule; identify the phase in which this new species would be isolated in a separatory funnel and explain why it would be found the..
assuming that a cube has a volume of3.7x10-19cm3 calculate the length of each edge of the cube. enter a number with the
Question- The propane fuel (C3H8) used in gas barbeques burns according to the following thermochemical equation-
Problem- Calculate the concentrations of all species in a 1.00M Na2SO3 sodium sulfite solution. The ionization constants for sulfurous acid are Ka1=1.4x10^-2 and Ka2=6.3x10^-8
Oxygen gas, generated by the reaction 2KClO3(s) ? 2KCl(s) + 3O2(g), is collected over water at 27°C in a 3.78-L vessel at a total pressure of 730. torr. (The vapor pressure of H2O at 27°C is 26.0 torr.) How many moles of KClO3 were consumed in the..
what is the ratio of the population of nuclei oriented opposite the magnetic field with respect to those oriented with the magnetic field at 25°C
the sample has a mass of .211 grams,a volume of .25 and a temperature of 275K at a pressure of .945 atmospheres. What is the most likely element forming the sample?
The final temperature of the water is 25.7 oC. What is the specific heat capacity of the metal?
What are the coefficients of the six species in the balanced equation above. Remember to include H2O(l) and H+(aq) in the appropriate blanks.
What is the theoretical yield of calcium hydroxide? What is the percent yield?
Calculate the transformation rate for the austenite-to-pearlite transformation at 650 °C and at 600 °C. Show the relationship(s) you used to arrive at your answers.
gypsum is hydrated calcium sulfate. a 4.89 g sample of this hydrate was heated and after the water was driven off 3.87g
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