1. For an electron, the number of values the spin quantum number Ms can take on is; Three, four, one, two?

2. what is the threshold energy for the production of an proton-antiproton pair? Emin= MeV

Consider the following reaction: 2H2S(g)+SO2(g)⇌3S(s)+2H2O(g) A reaction mixture initially containing 0.500 M H2S and 0.500 M SO2 was found to contain 1.3×10−3 M H2O at a certain temperature. A second reaction mixture at the same temperature initially contains [H2S]= 0.255 M and [SO2]= 0.325 M . Calculate the equilibrium concentration of H2O in the second mixture at this temperature.

In a titration of 44.86 mL of 0.3356 M ammonia with 0.3356 M aqueous nitric acid, what is the pH of the solution when 44.86 mL of the acid have been added?

List the following aqueous solutions in order of decreasing freezing point: 0.040 m glycerin (C3H8O3), 0.020 m KBr, 0.030 m phenol (C6H5OH

1)Hypochlorous acid (HOCl), a weak acid (pKa = 7.6) can be used for disinfecting water. If 1 mg of HOCl is added to pure water to make up 1 L of liquid volume, what is the equilibrium pH?

(b) The pH of the solution in part (a) is to be raised to 7.0 by addition of NaOH, a strong base. What mass (in grams) of NaOH must be added?

I'm being asked to compute the literature "true" value of the heat of solution of KCll at infinite solution. What do I need/how do I do this?

Questions are as shown. NO additional information was given.

1. Calculate the f.e.m. for the following reaction at 25^oC Li⁺_(aq) (1.8e-4M) +   2Cl^-_(aq) (6.9e-2M)      →   Li_(s) ( - M) +   Cl_2(g) ( - M)

E_cell = ? (2 decimals accuracy!)

2. Calculate the f.e.m. for the following reaction at 25^oC Au³⁺_(aq) (3.0e-2M) +   2I^-_(aq) (2.2e-3M)      →   Au_(s) ( - M) +   I_2(s) ( - M)

E_cell =? (2 decimals accuracy!)

A standard iodate solution is prepared at 22.0 °C by dissolving 0.9123 g (uncorrected mass) of KIO3 with deionized water in a 499.92 mL volumetric flask. To standardize the Na2S2O3 solution, a 10.005 mL aliquot of the KIO3 solution is acidified, treated with excess KI, and titrated with Na2S2O3, requiring 22.05 mL to reach the end point. Finally, a 10.005 mL aliquot of unknown Cu solution is reduced with excess KI. The liberated iodine requires 31.46 mL of Na2S2O3 solution to reach the end point. Calculate the unknown Cu concentration in g/L.

These are what the correct step answers should be, just need to show how to do work:

[KIO3 standard (corrected to 20 °C): 8.53255 mM]

[S2O3 2− titrant: 23.2294 mM]

FINAL ANSWER: [Unknown: 4.64160 g/L Cu]

A protease is an enzyme that catalyzes the hydrolysis of the peptide bonds of target proteins. How might a protease bind a target protein so that its main chain becomes fully extended in the vicinity of the vulnerable peptide bond?

The hint that we got was this: look for a way the protease might stabilize the substrate during hydrolysis

I'm open to several possibilities at this point but please explain your answer in detail.

Solid carbon can react with gaseous water to form carbon monoxide gas and hydrogen gas. The equilibrium constant for the reaction at 700.0 K is Kp=1.60×10−3. If a 1.55-L reaction vessel initially contains 247 torr of water at 700.0 K in contact with excess solid carbon, find the percent by mass of hydrogen gas of the gaseous reaction mixture at equilibrium.

Show the calculation of the oxidation number (charge) of ONLY the atoms which are changing in the following redox equations and then show how they are used to balance the following redox equation. MnO + PbO2 + HNO3 → HMnO4 + Pb(NO3)2 + H2O

When a saturated paraffin such as polymethylene is chlorinated, chlorine replaces hydrogen at random. Invariably, small amounts of chlorine (10–50 wt% Cl) cause a lowering of softening point. Large amounts (about 70%) raise the softening point. Rationalize on the basis of intermolecular forces

1) Use the Henderson-Hasselbalch equation to calculate the pH of a buffer solution prepared by mixing equal volumes of 0.230 M NaHCO3 and 9.00×10⁻² M Na2CO3. (use Ka values given on Wiki)

2) A volume of 100 mL of a 0.440 M HNO3 solution is titrated with 0.440 M KOH. Calculate the volume of KOH required to reach the equivalence point.

1. When heated, calcium carbonate gives off CO2 according to the following reaction: CaCO3(s) → CO2(g) + CaO(s) You perform this reaction in lab by heating a test tube containing CaCO3 and collect the CO2 over water for later analysis. You collect 20.3 mL of gas. What mass of CO2 have you collected? Assume the temperature and pressure of your lab is 25 °C and 1.00 atm. The vapor pressure of water at 25 °C is 24.0 Torr. (a) 35.4 mg (b) 36.5 mg (c) 611 mg (d) 877 mg (e) 26.9 g

2. At 25 °C, the Ksp of CaSO4 is 9.1×10–6 . How many of the following procedures will change the value of Ksp for CaSO4? I. presence of Na2SO4 in solution II. changing the temperature of the solution III. changing the amount of water in solution IV. presence of Ca(NO3)2 in solution (a) 0 (b) 1 (c) 2 (d) 3 (e) 4