Which ONE of the following represents the CORRECT equilibrium constant expression for the reaction:

H2PO4 ¯ + OH¯ ⇔ HPO4^2-+ H2O

(a) 1/k_b(b) 1/k_a (c) k_w/k_a(d) k_w/k_b(e) k_b/k_w

Newton’s laws of motion, such as trajectory and momentum, do not apply to subatomic particles as they do to larger objects such as baseballs. Research how subatomic particles (protons, neutrons, and electrons) behave and compare their behavior to the behavior of macroscopic particles that are governed by classical Newtonian physics.

·        How does the quantum, subatomic world differ from the world we can see and touch around us?

·        Specifically, do the same laws of classical physics for such things as momentum work in the subatomic world?

Which of the following is NOT a difference of archaeal membrane lipids relative to those of other organisms?

A backbone other than glycerol is used.

Fatty acid esters are replaced with long chain alcohol esters to the glycerol.

The long hydrophobic tails are branched rather than being linear.

Ether linkages instead of ester linkages are used.

Choose the most likely pattern for the crystal field diagram for the complex trans–[Ni(NH₃)₂(CN)₄]^2– where CN^– produces a much stronger crystal field than does NH₃.?

From the answer the pattern show it is a square planer. Could anyone explain it? why is not octahedral?

for azo dyes, why does an instantaneous and dramatic color change occur when the two coupling reagents are mixed together?

fter thoroughly reviewing the physical process of capillary action and surface tension and viscosity, write a thoughtful, complete, but concise response to the following: Explain how capillary action is used to transport water and nutrients in trees. Explain how surface tension and viscosity are used to transport water and nutrients in trees.

Given what you know about the pharmacophore of morphine (ie draw the new compound) that will convert the compound from an agonist (morphine) to an antagonist (your experimental compound).

A student needs 62.5 g of zinc sulfide, a white pigment, for an art project. He can synthesize it using the reaction: Na2S (aq) + Zn(NO3)2 (aq) = ZnS(s) + NaNO3 (aq) (not balanced) (78.04) (189.4) (97.44) (85.00) How many grams of zinc nitrate will he need if the percent yield of zinc sulfide is 85.0 %?

If 0.175 L of 0.364 M ammonia solution is titriated with 0.095 L of 0.35 M HCI, what is the pH of the resulting solution?

What is the constituent particle, bond type, texture (hard, soft, brittle, malleable, ductile), conductivity, melting point (high, intermediate, low, variable), solubility of:

Molecular Solids

Covalent Network Structures

Ionic Networks

Metallic Networks

Discrete Molecules

Extended Structures

what is the difference between an amorphous, an oriented, and a crystalline plastics?

1)Put the following chromatography solvent in order of polarity as a chromatography solvent: acetone, n-propanol, water, hexane, diethyl ether, methanol.
2) You will be doing chromatography with a mixture of n-propanol and water. Would it make sense to add
hexane to this mixture to try and make it work better? Explain.
5) Two cars full of people took a day trip. Car A had a lot of little kids and stopped at lots of rest stops and
gas stations to give them a break. Car B had just adults in it, and only stopped once. Of course Car B got
to the destination first. Explain how this in an analogy for the chromatography you are doing in this
experiment.
help please

1) a) How would you make 600 ml of a 0.25 M ammonia and 0.20 M ammonium nitrate from a bottle of 6.0 M ammonia (aq) and a bottle of solid ammonium nitrate.

grams of ammonium nitrate?
   mL of ammonia?
mL of H2O?

   b) Calculate pH (Kb = 1.8 x 10^-5)

2) How many mL of Acid (12 M HCl) or base (12 M NaOH) would you need to shift the pH 0.5 increments down?

1. Calculate the concentration of the AgNO3 solution.

2. Use your AgNO3 concentration to determine the concentration of the KSCN titrant from your standardization titrations. (See Equation 6-1)

3. Determine the amount of excess Ag+ remaining in the filtrate of your unknown solutions:

a. Equation 6-1 shows the stoichiometry for this reaction.

Ag+ + SCN- --> AgSCN

b. Use the volume of KSCN used, along with the true concentration of KSCN you determined, to find the moles of Ag+ remaining in solution after the reaction with chloride.

c. Use the concentration of AgNO3 to determine the total moles of silver you added to the reaction.

d. The difference between the values you determined in b and c equals the total number of moles of silver that reacted with the chloride in your aliquot of unknown solution.

e. Determine and report the mass% of chloride in your unknown sample.

Okay so I have my concentration of AgNO3 buthow do I use it to find the concentration of the KSCN titrant? Also How to determine the excess amount of Ag+ remaining in the filtrate of my unknown silutions?

please write it by your own.

Analysis Based [Short Answers; ANY 2 less than 100 words]
1. The foam produced by the used of detergents, is harmful to aquatic life. Explain Why?

2. What might life be like without the ozone layer?

3. What causes Air pollution? How can we reduce air pollution

4. What are the common purification techniques for Brackish or sea Water? In this region, which is the common technique employed and why