1.gives the correct order for atomic radius for Mg, Na, P, Si and Ar?

2.Which one of the following elements is the most metallic? a.Ar b.K c.Mg d.Al e,Na

3.A gas mixture of Ne and Ar has a total pressure of 4.00 bar and contains 16.0 mol of gas. If the partial pressure of Ne is 2.75 bar, how many moles of Ar are in the mixture?

4.Which statements about viscosity are generally true?

(i) Viscosity increases as temperature decreases.

(ii) Viscosity increases in a series of related compounds as molecular mass increases.

(iii) Viscosity increases as intermolecular forces increase.

5.The standard cell potential (E°_cell) of the reaction below is -0.55 V. What is ΔG° (kJ/mol) for the reaction?

I₂(s) + 2 Br^-(aq) → 2 I^-(aq) + Br₂(l)

The initial steps in polymerization to form Prussian Blue is a photo-initiated reduction of Fe(III) to Fe(II).

i. This is a charge-transfer transition – what kind of charge transfer transition is it, and what is oxidized?  

ii. A gas is released as the photo-sensitized mixture is irradiated. What is it?

iii. Why does reduction of the Fe(III) center make the complex more labile? Explain in terms of CFSE.

Lycopene and beta carotene are important antioxidants found in some fruits and vegetables. Suppose an organic solvent was going to be used to extract and measure lycopene from a new hybrid tomato. A sample of aqueous tomato paste was introduced into a separatory funnel. Then an organic solvent was added. The funnel contents were swirled for several minutes. After extraction, the concentration of lycopene in the organic solvent was found to be 6.5 x 10^-4M while the aqueous phase maintained a concentration of 1.5 x 10^-5. What is the value of the partition ratio (K_D) with this extraction?

Using the value of K_D from "A", what fraction of lycopene would be extracted from the aqueous tomato paste into the organic phase if you began with 100.0 mL of tomato paste and added 50.0 mL of the organic solvent?

A visible light spectrophotometric determination of penicillin makes use of color-forming reaction of the penicillin. If this compound absorbs at 475 nm with an ε = 1560 M^-1cm^-1, what would be calculated as the limit of detection with an instrument, using a 1.00 cm cuvette, with its smallest absorbance measurement at 0.005?

An ideal gas (which is is a hypothetical gas that conforms to the laws governing gas behavior) confined to a container with a massless piston at the top. (Figure 2) A massless wire is attached to the piston. When an external pressure of 2.00 atm is applied to the wire, the gas compresses from 6.40 to 3.20 LL . When the external pressure is increased to 2.50 atmatm, the gas further compresses from 3.20 to 2.56 LL .

In a separate experiment with the same initial conditions, a pressure of 2.50 atm was applied to the ideal gas, decreasing its volume from 6.40 to 2.56 LL in one step.

If the final temperature was the same for both processes, what is the difference between q for the two-step process and q for the one-step process in joules?

Express your answer with the appropriate units.

A buffer solution contains 0.424 M ammonium chloride and 0.235 M ammonia.  

If 0.0297 moles of potassium hydroxide are added to 225 mL of this buffer, what is the pH of the resulting solution ?  
(Assume that the volume change does not change upon adding potassium hydroxide)

pH =

A buffer solution contains 0.382 M nitrous acid and 0.466 M potassium nitrite.  

If 0.0176 moles of hydrobromic acid are added to 150. mL of this buffer, what is the pH of the resulting solution ?  
(Assume that the volume change does not change upon adding hydrobromic acid)

pH =

A buffer solution contains 0.463 M KH₂PO₄ and 0.305 M Na₂HPO₄.  

If 0.0180 moles of sodium hydroxide are added to 150. mL of this buffer, what is the pH of the resulting solution ?  
(Assume that the volume does not change upon adding sodium hydroxide)

pH =

The equilibrium constant, K_c, for the following reaction is 1.80×10^-2 at 698 K.

2HI(g) -->H₂(g) + I₂(g)

Calculate the equilibrium concentrations of reactant and products when 0.257 moles of HI are introduced into a 1.00 L vessel at 698 K.

The equilibrium constant, K_c, for the following reaction is 83.3 at 500 K.

PCl₃(g) + Cl₂(g) -->PCl₅(g)

Calculate the equilibrium concentrations of reactant and products when 0.420 moles of PCl₃ and 0.420 moles of Cl₂ are introduced into a 1.00 L vessel at 500 K.

Draw the Sn1 intermediate and Sn2 transitions state for both ethyl-2-chloroacetate and benzyl bromide (α-bromotoluene). Use these structures to explain the differences in reactivity between these two compounds.

1. Some special GC detectors, such NPD and FPD, are often used to analyzed nitrogen containing and phosphorus containing pesticides, respectively, because these detectors have higher sensitivity than FID for the above-mentioned chemicals (T or F);
2. UV spectra always give sharp peaks that reflect the maximal absorption of chromophores (T or F);

A buffer solution contains 0.350 M NaHSO3 and 0.387 M Na2SO3. Determine the pH change when 0.104 mol HNO3 is added to 1.00 L of the buffer.

pH change =

This is all the info that was given

1a) A 2.95 g sample of an unknown chlorofluorocarbon (an organic compound containing chlorine and fluorine) is decomposed and produces 581 mL of chlorine gas at a pressure of 752 mmHg and a temperature of 298 K. What is the percent by mass of chlorine in the chlorofluorocarbon?

1b) Calculate the density of Freon-11 (CFCl3) at 118 °C and 7.20 atm

Should the order of spots of molecules on the TLC be different when two different eluent solvents are used? Explain your answer?

Should the TLC spot of a compound move higher or lower or stay the same when compared to in a less polar eluent solvent system when a more polar eluent solvent system is used?

If you started with 0.100g of tetraphenylcyclopentadienone and 0.100g of diphenylacetylene and obtained 0.089 g of hexaphenylbenzene from the experiment. Calculate percent Yield of hexaphenylbenzene?

Tetraphenylcyclopentadienone MolarMass= 384.478g/mol

diphenylacetylene MolarMass = 178.24 g/mol

With work shown

1) How many moles of H2O will be produced if 6.80 x 1024 formula units of NH4NO3 are decomposed in the reaction given below?

NH4NO3 -------- N2O + 2H2O

2) Aspirin (C9H8O4) can be made in the laboratory by reacting salicylic acid (C7H6O3) with acetyl chloride (C2H3ClO).

C7H6O3 + C2H3ClO-------- C9H8O4 + HCl

What mass of HCl is produced by the complete reaction of 36.0 g of acetyl chloride?

3) Propane (C3H8) burns in oxygen to form CO2 and H2O according to the following equation. How many grams of O2 are required to burn 3.01 x 1023 propane molecules?

C3H8 + 5 O2-------3 CO2 + 4 H2O