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Problem- 4.0 g. sodium hydroxide are dissolved in 100g.of water. The initial temperature of both materials was 21 degrees Celisius. the final temperature after mixing was 30.9 degress cilsius. Assume the solution has the same specific heat as water and that you are using a perfect calorimeter with a heat capacity of zero. Calculate enthalpy of solution for sodium hydroxide in kj/mole
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A solution was analyzed using AA spec for Au. The signal was 150. This sample solution was placed in a 10 mL container and spiked with 2 mL of a 0.125 mM standard Au solution. The spiked solution returned a signal of 185.
The gas-phase reaction C: RateH3NC = CH3CN has been studied in a closed vessel, and the rate equation was found to be: Rate = -delta [CH3NC]/delta t = k[CH3NC]. Which one of the folowing actions is least likely to cause a change in the rate of the..
How many grams of calcium hydroxide is produced when 3.2 micrograms of CaC2 reacts with 5.1 micrograms of water?
The enthalpy of vaporization of water at 373 K and 1 bar is 40.7 kJ/mol and the molar heat capacities are 75.3 J/(mol K) for liquid and 33.6 J/(mol K) for gaseous water. Find the enthalpy of vaporization of water at 273 K and 1 bar.
What is the correct electron configuration for copper Answer a. [Ar]4s23d8 b. [Ar]4s23d9 c. [Ar]4s13d10 d. [Ar]3d10 e. [Ca]3d9
Explain the meanings of Vmax and Km. How do you get them from a graph of v vs. [S]. Draw a generic example and label appropriately. What are the differences between a competitive and non-competitive inhibition
A 50.00-mL sample of 0.100 M KOH is titrated with 0.152 M HNO3. Calculate the pH of the solution after 52.00 mL of HNO3 is added.
Atoms of different elements also have different average masses, just like kernels and marbles. Use the mass values from a periodic table to answer the following questions.
Which of the subsequent pairs of compounds would be most easily separated by thin layer chromatography: n-octyl alcohol and1-octene, hexadecane and octadecane or chlorobenzene and bromobenzene
What is the mass of a single weight (assume one step work) you need to put on a bike pump to take the air in the pump from 1 atmosphere to 9 atmospheres?
What is the approximate ?H in kJ for the following reaction as written: 2NH3(g) --> 3H2(g) + N2(g) Careful, what kind of bond does the nitrogen molecule make
Consider the following equilibrium process at 686°C: CO2(g) + H2(g) CO(g) + H2O(g) The equilibrium concentrations of the reacting species are [CO] = 0.050 M, [H2] = 0.045 M, [CO2] = 0.086 M, and [H2O] = 0.040 M.
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