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Determine the heat of combustion of Mg, first three empty Styrofoam cups were weighed with an electronic balance. The results were recorded. Second, a 21 ml of HCl was poured in the Styrofoam cup. This was in order to fully dissolve the Mg. Third, the temperature of the solution was measured (using a thermometer) in a covered Styrofoam cup until it reached the highest temperature. The initial temperature was recorded. After that, the magnesium was added to the covered Styrofoam cup. Finally, the temperatures of solutions were recorded when thermometer reached the highest number.
Calculate the pH of 0.525 L of a 0.190 M NH4Cl - 0.190 M NH3 buffer before and after the addition of the following substances. Assume that the volume remains constant
Determine the oder of the reaction in H2O2 and KI. Explain how you arrived at your answer. Calculate the rate constant, k, and write the rate law expression for the catalyzed decomposition of hydrogen peroxide.
The visible part of the hydrogen atom spectrum is called the Balmer series (n1 = 2). The violet line has a wavelength of 410.2 nm.
what is the ph at the equivalence point when 100 ml of 0.15 m hydrofluoric acid hf is titrated with 0.5 m sodium
Explain what is the value of n for the original hydrate K3[Fe(C2O4)3] * nH2O. Explain what is the percent relative error compared to our target compound
A mixture of three gases has a total pressure at 293K of 1380 mmHg. The mixture is analyzed and is found to contain 1.27 mol CO2, 3.04 mol CO, and 1.50 mol Ar. What is the partial pressure of Ar?
Presume a buffer solution is made from formic and (HCHO3) and sodium formate (NaCHO2). Explain what is the net ionic equation for the reaction that occurs when a small amount of hydrochloric acid is added to the buffer.
What is the pressure in atmospheres inside a container of gas connected to a mercury-filled open-end manometer when the level in the arm connected to the container is 28.0cm higher than the level in the arm open to the atmosphere and the atmospher..
what is the vapor pressure of a solution made by adding 164g flycerin to 338mL H2O at 39.8 C. The vapor pressure pf pure water at 39.8 C is 54.74 torr
Write the formula for each of the following compounds, being sure to use brackets to indicate the coordination sphere.
if 1.0 mol of electrons flows through the cell, how many grams increase or decrease in mass will the silver electrode undergo
Assuming that the specific heat of the solution is 4.18J/g*c, and assuming that no heart is lost to the surroundings, determine the value of delta H (in kJ/ mol Sr) for the reaction
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