(a) Starting with the orbital diagram of a sulfur atom, describe the steps needed to construct hybrid orbitals appropriate to describe the bonding in SF2. (b) what is the name given to the hybrid orbitals. (c) sketch the large lobes of these hybrid orbitals. (d) Would the hybridization scheme in part (a) be appropriate for SF4? Explain

It is important to understand what an amino acid bond is, where at is located within a protein. Why is this such as table bond and what the products if it's hydrolysis?

A solution of 0.2152M NaOH is used to neutralize 15.00mL H2SO4 solution.

H2SO4(aq) + 2NaOH(aq) ? Na2SO4(aq) + 2H2O(l)

If 32.59mL NaOH solution is required to reach the endpoint, what is the molarity of the H2SO4 solution?

3. Molecular bromine is 24% dissociated at 1600K and 1.00 bar in the equilibrium:

Br​​2 (g)-------- 2Br(g)

Calculate:

a) the equilibrium constant K at 1600K (8)

b) the standard Gibbs energy of reaction 4)

C) K at 2000K , given that ∆r H = +112kj/mol over the temperature range. (6)

PLease explain in detail the function of Lithium Fluoride and aluminium in the Lit/Al layer in organic solar cells. Please describe the organic chemistry structure in regards to the role.

How much heat is evolved in converting 1.00 mol of steam at 155.0 ∘C to ice at -45.0 ∘C? The heat capacity of steam is 2.01 J/(g⋅∘C) and of ice is 2.09 J/(g⋅∘C). Express your answer in units of kilojoules Assume the system is at atmospheric pressure.

Thanks all!!

The mass of a 270. mL beaker is 178 g when empty. Determine its mass when filled with the following substances.

(a) water (density 0.9970 g/cm³ at 20°C)

____ g
(b) alcohol (density 0.7893 g/cm³ at 20°C)
____ g
(c) mercury (density 13.546 g/cm³ at 20°C)
____ g
(d) Explain why mercury containing pollutants are usually found in the mud at the bottom of a lake of stream.

-Mercury has a negative charge and is attracted to the positively charged particles on the lake or stream bed.

-Mercury containing pollutants do not float.    

-Mercury is denser, and therefore sinks to the bottom of the lake or stream.

Part A

It takes 47.0 J to raise the temperature of an 9.50 g piece of unknown metal from 13.0∘C to 24.8 ∘C. What is the specific heat for the metal?

Express your answer with the appropriate units. Cs=

Parts B and C

The next two questions pertain to silver. They have nothing to do with unknown metal described in Part A.

Part B

The molar heat capacity of silver is 25.35 J/mol⋅∘C. How much energy would it take to raise the temperature of 9.50 g of silver by 19.5 ∘C?

Express your answer with the appropriate units. q=

Part C

What is the specific heat of silver?

Express your answer with the appropriate units.

You want to determine the percent of sulfate in an unknown sample of a hydrated metal sulfate with the formula My(SO4)x·nH2O. You dissolve 0.2888 g of your unknown in DI water and heat to near boiling. You react the dissolved unknown with a hot barium chloride solution and you collect the barium sulfate you make via gravity filtration. The filter paper weighed 0.597 g after a piece was torn off. The dry barium sulfate crystal and the filter paper weighed 0.910 g. Answer the following:

1. What is the molar mass of barium sulfate?

2. What is the molar mass of sulfate?

3. How many moles of sulfate were produced?

4. How many grams of sulfate were produced?

5. What is the percent sulfate?

I know the answer for the first two but im unsure of the next couple of questions. Thank you in advnadce :)

write a detailed mechanism for a) the hydrolysis of methyl salicylate in basic solution b) the acetylation of salicylic acid in acidic solution and c) the acetylation of vanillin in basic solution.

Calculate the pH of a solution made by adding 54 g of sodium acetate, NaCH3COO, to 12 g of acetic acid, CH3COOH, and dissolving in water to make 400. mL of solution.

A buffer that contains 0.592 M base, B, and 0.286 M of its conjugate acid, BH+, has a pH of 8.87. What is the pH after 0.0020 mol of HCl is added to 0.250 L of the solution?

1.)Describe the effect of increasing the concentration of the reactants on the rate of a reaction.

2.)The exponents in a rate law have no relationship to the coefficients in the overall balanced equation for the reaction. Give an example of a balanced equation and the rate law for a reaction that clearly demonstrates this.

3.)Compare the half-life equations for a first-order and a second-order reaction. For which reaction order is the value of the half-life independent of the reactant concentration??

The two pK_as of sulfurous acid (H₂SO₃) are 1.81 and 6.91, respectively. The predominant species at pH = 9 is: (Question from "Cracking the MCAT, 2010-2011 edition" by The Princeton Review)