Given that the specific heat capacities of ice and steam are 2.06 J/g°C and 2.03 J/g°C, the molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of water is 4.18 J/g°C, calculate the total quantity of heat evolved when 27.1 g of steam at 216°C is condensed, cooled, and frozen to ice at -50.°C.

______KJ

Please show the steps

20.0 mL of nitric acid (HNO3) solution is neutralized with 30.0 mL 0.10M of potassium hydroxide (KOH) solution. what is the concentration of nitric acid solution? The answer is 0.67 M but how do you get that?

1mol of an ideal gas is inside a cylinder with a piston under a pressure of 6 atm. When reducing the pressure to 2 atm at constant T = 300K:
(a) Who is doing work, the piston or the gas?
(b) What is the type of process for the maximum work? Find the maximum amount of work.
(c) What is the type of process for the minimum work? Find the minimum amount of work.

Calculate the change of enthalpy for: 4S + 6O2= 4SO3 Delta H= ___ kJ

In all ligand titrations, the concentration of ligand is varied around the KD of the complex. In a stoichiometric titration, what is the concentration of receptor in relationship to KD? How does this differ from a binding titration experiment? Can you get a KD from a stoichiometric binding Titration? Why do the stoichiometric titration experiment this way, and what kind of information does it give you?

What is the theoretical (minimum) number of equivalents of methylmagnesium iodide (CHMgI) needed for reaction with benzoin? How many equivalents of CH3MgI did you use relative to benzoin and why is this number of equivalents necessary for the reaction?

In this experiment, we used 0.287g of magnesium turnings with 13mL of a 1.0M solution of methyl iodide (CH3I) in anhydrous diethyl ether to synthesize methylmagnesium iodide (CHMgI)

We then reacted methylmagnesium iodide (CHMgI) with 0.507g of a benzoin solution in 10mL of anhydrous CH2Cl2

3. Natural gas is a mixture of hydrocarbons and recent developments in directional drilling and hydraulic stimulation has seen that the majority of natural gas is now produced from shale gases. These gases may contain higher proportions of higher alkanes. In order for these gases to be used via the pipeline, they must meet certain pipeline quality standards. These standards are even stricter when the natural gas is to be used by natural gas vehicles. Suppose natural gas from a shale well enters your furnace. The pressure and temperature of the mixture are 17 °C and 100 kPa. A molar analysis shows the gas is 80% methane, 10% ethane, and 10% propane. Determine the following:

a.) Mass fraction of each component (10 points)

b.) The partial pressure of each component (10 points)

c.) The mass flow rate in kg/s for a volumetric flowrate of 1m3 /sec (10 points)

For each of the following octahedral complexes:

a) determine the number of 'd' electrons on the metal atom.

b) determine the number of unpaired electrons on the metal atom.

c) calculate the magnetic moment (spin only value) in units of Bohr magnetons.

d) calculate the ligand field stabilization energy, LFSE, in units of delta0

1)[Mn(H2O)6]2+

2)[CrCl6]4-

3)[NiF6]3-

4)[Co(CN)6]4-

5)[Mn(CO)6]+

The Destruction of Jericho The Bible describes the Exodus as a period of 40 years that began with plagues in Egypt and ended with the destruction of Jericho. Archeologists seeking to establish the exact dates of these events have proposed that the plagues coincided with a huge eruption of the volcano Thera in the Aegean Sea Radiocarbon dating of blackened grains from the site of ancient Jericho provides a date of 1315 BC +/- 13 years for the fall of the city. What is the relative amount of ¹⁴C in the old grain vs. the new grain in 2007 AD

(A_t/A_o)_{2007 AD =?}

When light of frequency 4.96×10¹⁵ s^-1 shines on the surface of a metal, electrons are ejected with a maximum kinetic energy of 3.88×10^-19 J.

a) Calculate the wavelength of this light.

b) Find the binding energy of electrons to the metal.

c) What is the longest wavelength of light that will eject electrons from this metal?

7. a). Why should the core of most globular and membrane proteins consist almost entirely of α-helix and β-

sheets?

b). Name the structural and functional advantages of having proteins with a quaternary structure.

c). In a protein, what amino acids (polar or non-polar) would mostly be in the interior folds?

Give a reason for your answer.

d) On the surface of a folded protein, amino acids with what properties would be more predominant?

Give a reason for your answer.

Calculate the frequencies and energies for these 4 wavelengths: 410 nm, 435nm, 487nm, 655nm

A certain mineral used as a food preservative contains 8.242 % potassium, 5.687% aluminum, 5.099% hydrogen, 67.45 % oxygen and 13.52 % sulfur. What is the empirical formula for this compound?

what is the ph of a 0.10m solution of nacn at 25°c (ka=4.9×10^-10 for hcn). I've gotten 5.15 as a pH but the correct answer is 11.15. I don't see how it's 11.15...