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Question- A 1.50 g sample of solid NH4NO3 was added to 35.0 mL of water in a styrofoam cup (insulated from the environment) and stirred until it dissolved. The temperature of the solution dropped from 22.7 C to 19.4 C. What is the heat of reaction for dissolving NH4NO3, expressed in KJ/mol?
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Draw the mechanism for each reaction you will do today. Pyridinium tribromide releases molecular bromine, so molecular bromine is the brominating agent.
What is the molecular weight of thiopene, if 0.74 g of thiopene occupies a volume of 270 mL at 760 mmHg and 100 degrees C?
The pH after adding 10. mL of .10 M NaOH is 4.31. Calculate the total volume of .10 M NaOH that the buffered sample can absorb
Write the lewis structure for SeF6. What is the general "ABX" structure, shape name, and molecular polarity?
Show the overall reaction of racemic 3-bromohexane from (E)-3-hexene by entering the structures of the products and reactants in the template provided. (E)-3-hexene (S)-3-bromohexane (R)-3-bromohexane
When adjusted for any changes in delta H and delta S with temperature, the standard free energy change delta G note at 2400 K is equal to 1.22*10^5 J/mol . Calculate the equilibrium constant at 2400 K
What is the vapor pressure of pentane in this solution at 25°C? The vapor pressure of the pure liquids at 25°C are 451 torr for pentane and 321 torr for cyclopentane. Assume that the solution is an ideal solution.
A mixture of CO2 and Kr weighs 35.0g and exerts a pressure of 0.708 atm in its container. Since Kr is expensive, you wish to recover it from the mixture. After the CO2 is completely removed by absorption with NaOH(s), the pressure in the container..
Question- Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation is S2(g) + C(s)= CS2(g). KC=9.40 at 900K.
A. Use the dipole moments of HF and HCl ( HF= 1.08 D, HCl = 1.82) together with the percent ionic character of each bond ( HF= 20% ionic, HCl= 45% ionic) to estimate the bond length in each molecule.
bac is often reported in weight-volume percent wv. for example a bac of 0.08 corresponds to 0.08 g ch3ch2oh per 100 ml
At a pressure of O2 of 1.00atm, the mole fraction of dissolved O2 in water is 1.6x10^(-5) at 333 K. What mass of O2 (MM = 32.0) can dissolve in 250 g of water under 0.21atm of O2 pressure at 333 K
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