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A student measures out 100.0ml of 1.00 M HCl and places it in a styrofoam cup. The temperature od HCl is 22.3 C. She then addes 1.002g og MgO to the cup. The temperature rises to 29.7 C.
a) Determine the enthalpy of he reaction. Assume that the density and the specific heat of the solution are the same as water. Include the correct sign.
b) Determine the change of enthalpy for the reaction in units of KJ/mol og MgO. Include the correct sing.
Write the reaction between Fe3+ and SCN- in which [Fe(SCN)3] forms. b) Determine the equilibrium expression for K associated with this reaction
Given the following equilibrium constant at 25 C, calculate the equilibrium constant for the unknown reaction below.
calculate the detection limit of this reaction for each halide, the value below which there will be no observed reaction.
A mixture of gases contains 7.5g hydrogen and 29.6 nitrogen with a total pressure of 127 torr. Calculate the solubility of nitrogen gas
The entropy change for a reversible process can be defined by the expression ?S = q?/?T. Which statement about entropy change is not correct
the mechanism involved in the distillation of a mixture containing acetone and ethanol
Aluminum dissolves in HCL according to the equation written below, whereas copper does not react with HCL: 2Al+6HCL ---> 2AlCl3 + 3H2 a 35 gram sample of copper-aluminum alloy is dropped into .750 L of 3M HCl, and the reaction above proceeds as fa..
A solution is made by mixing 15.5 g of NaOH and 73.0 mL of 0.150 M HNO3. Calculate the concentration of OH- ion remaining in solution.
How much of the solution is needed?
A calorimeter contains 125 g of water at 26.1°C. A block of metal with a mass of 25 g is heated to 96.5°C and then placed in the water in the calorimeter.
34.62 mL sample of .1510 molar NaOH was needed to completely neutralize 50 mL of an H2SO4 solution. what is the concentration of the origional sulfuric acid solution?
Baking soda (NaHCO3) can be made in large quantities by the following reaction: NaCl + NH3 + CO2 + H2O ---> NaHCO3 + NH4Cl If 9.41g of NaCl reacts with excesses of the other reactants and 3.81g of NaHCO3 is isolated, what is the percent yield of t..
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