For each of the following compounds, determine the bond angles, electron-domain and molecular geometries, hybridization, and polarity associated with each molecule.

KrF₄

CHBr₃

N0₂^1-

BrF₃

Lead poisoning is a serious condition resulting from the ingestion of lead in food, water, or other environmental sources. It affects the central nervous system, leading to a variety of symptoms such as distractibility, lethargy, and loss of motor coordination. Lead poisoning is treated with chelating agents, substances that bind to metal ions, allowing it to be eliminated in the urine. A modern chelating agent used for this purpose is succimer (C4H6O4S2). Suppose you are trying to determine the appropriate dose for succimer treatment of lead poisoning.

What minimum mass of succimer (in mg) is needed to bind all of the lead in a patient's bloodstream? Assume that patient blood lead levels are 33 μg/dL , that total blood volume is 5.0 L, and that one mole of succimer binds one mole of lead.

Express your answer using two sigificant figures

Estimate the melting point of nickel, Ni, if its ∆_fusH is 17.61 kJ/mol and its ∆_fusS is 10.21 J/mol·K. (Compare this to a measured melting point of 1455◦C.)

magnesium metal reacts with aqueous hydrochloric acid to form hydrogen gas and aqueous magnesium chloride. Mg(s)+2HCl(aq)=MgCl2(aq)+H2(g)

A student performs this reaction in a laboratory and collects the hydrogen gas over water. The student collects 215.8mL of gas at a pressure of 755.2mmHg and a temperature of 22 degrees C.

(here are some answers I found already correct me if I am wrong)

I found the water pressure at 22 degrees C to be 19.8mmHg

I found the partial pressure of the hydrogen in the tube to be 735.4mmHg or 0.968atm

Using the ideal gas law to calculate moles of hydrogen produced in the reaction I got 0.0086 mol H2.

I need help with these questions.

How many moles of Mg reacted? (assume 100% yield)

What mass of Mg reacted?

Part A

What is the standard potential for the cell reaction in the hydrogen-oxygen fuel cell used in space vehicles?

Part B

What is the standard potential for the cell reaction in the PEM fuel cell used in electric automobiles?

1. Compare and contrast hydrophobic effect with micellar catalysis in a reaction.

In cyclic photophosphorylation, it is estimated that two electrons must be passed through the cycle to pump enough protons to generate one ATP. Assuming that the ΔG°' for hydrolysis of ATP under conditions existing in the chloroplast is about -50 kJ/mol, calculate the corresponding percent efficiency of cyclic photophosphorylation using light of 700nm.

Possibly Helpful Information:

E=h(c/λ)

h=Planck's Constant=6.626176 x 10^-34 J·s

C=Speed of Light=3x10⁸ m/sec

A)When 4.52 g of a nonelectrolyte solute is dissolved in water to make 795 mL of solution at 25 °C, the solution exerts an osmotic pressure of 871 torr. Find the concentration, moles of solute and mass of solute.

B)A solution is made by dissolving 0.683 mol of nonelectrolyte solute in 809 g of benzene. Calculate the freezing point, Tf, and boiling point, Tb, of the solution.

C)Assuming 100% dissociation, calculate the freezing point and boiling point of 1.12 m AgNO3(aq).

D)For each solute, identify the better solvent: water or carbon tetrachloride: Br2, CaCl2, C6H6, CH3OH

BIOCHEMISTRY: Independent mutations in 4 different gene types are required for the cell to become cancerous. Assume that a hypothetical intestinal stem cell divides every 4 days. The general DNA replication error is 10^-8 per nucleotide per replication, average gene length is 8000 nucleotides, and the person average lifespan is 70 years. If we assume that mutations in both alleles of 4 specific genes are required for the cell to become cancerous, what is an average random chance for that intestinal stem cell to acquire these specific mutations during its lifetime? After calculating this number, think how it compares to the lifetime chances of a person getting cancer, and why these numbers do not seem to match (remember that human body has 10^13 cells).

Given the ∆G° changes below, determine ∆G° for 2 A + B + D → 2 F

A + B → C ∆G° = -35 kJ

A + D → E + F ∆G° = 20 kJ

F → C + E ∆G° = 15 kJ

What is the molar solubility of AgCl in 0.40 M NaCN if the colorless complex ion Ag(CN)2 - forms? Ksp for AgCl is 1.8

WHAT QUANTITY OF A 70% ACID SOLUTION HAS TO BE MIXED WITH A 20% ACID SOLUTION TO GET 300ml OF A 45% ACID SOLUTION ?

which is the stronger acid m nitrobenzoic acid or p nitrobenzoic acid? provide structures to support your choice?

the water level in the co2 collection cylinder is higher than the water level outside the the cylinder. a) is the wet co2 gas pressure greater or less than the atmosspheric pressure? b) an adjustment is made to the equilibrate the water levels. will the volume of the wet co2 gas increase or decrese, explain c) the student choose not to equilibrate the inside and outside water levels. Will the reproted number of moles of co2 generated be too low too high or unaffected, explain