Please explain all answers

1) Phenol was the first antiseptic. It has the chemical composition 76.57% C, 6.43% H, 17.00% O. The molecular weight of phenol was determined by mass spectroscopy to be 94.114 g/mol. What is the molecular formula for phenol?

2) A 3.5514 g of a chromium oxide was found to contain 2.4299 g of chromium and 1.1215 g oxygen. What is the empirical formula for this chromium oxide?

3) Phosphoric acid is produced by the reaction of calcium phosphate, Ca3(PO4)2, with sulfuric acid. How much phosphoric acid can one make from exactly one US ton (2000 lbs) of calcium phosphate?

The energy efficency ratio of a refrigerator that consumes 1800 W of electricty to remove 12,000 BTU/h of heat does not exceed 3.5. True or False?

Consider the Arrhenius equation.

K= Ae^-Ea/RT

Discuss the effect of changing the basicity of the nucleophile would have on the activation energy, and therefore on the rate constant. Describe the molecularity and rate law of the reaction. How could this be determined experimentally?

in a 1x10^-8 M solution of HNO3(aq) at 25C identify the relative molar amounts of these species from least to most

OH- , H2O , HNO3 , H3O+ , NO3-

Methanol and ethanol are both oxidized by alcohol dehydrogenase (ADH). Methanol is poisonous because it is oxidized by ADH to form the highly toxic compound formaldehyde. The adult body has 40 L of water, throughout which these alcohols are rapidly and uniformly distributed. The densities of both alcohols are 0.79 g/mL. The Km of ADH for ethanol is 1.0x10-3 M, and for methanol the Km is 1.0x10-2 M. The molecular mass of methanol is 32 g/mol and that of ethanol is 46 g/mol. If an individual consumed 100 mL of methanol (a leathal amount), how much 100-proof whiskey (50% ethanol by volume) must this person consume in order to reduce the activity of ADH toward methanol to 5%? Assume the Ki for ethanol = Km.

The product of a Diels Alder reaction is often a pair of enantiomers. Does the reaction of 9 10-dihydroanthracene-9 10-a b-succinic anhydride produce enantiomers? If yes, please draw each enantiomer. If your answer is no explain why using accurate structural drawings.

What is the pH of 1.000 L of a solution of 100.0 g of glutamic acid (C5H9NO4, a diprotic acid; K1 = 8.5 ×
10−5, K2 = 3.39 × 10−10) to which has been added 20.0 g of NaOH during the preparation of monosodium
glutamate, the flavoring agent? What is the pH when exactly 1 mol of NaOH per mole of acid has been added?

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A fuel oil is composed of C₁₀H₂₂ and C₁₂H₂₆ in an unknown ratio (Note, there are no other significant components in the fuel oil). When the fuel oil is burned with 20% excess air the exhaust is tested and the ratio of water to CO₂ is found to be 1.088. Please note that the reaction proceeds to 100% completion (i.e. there is no detectable unburned fuel oil or carbon monoxide).   Determine the composition of the fuel oil.

Classify the following ionic compounds according to the Sigma-Aldrich solubility scale based on their molar solubility (S).

Answer choices are: Very Soluble, Freely Soluble, Soluble, Sparingly Soluble, Slightly Soluble, Very Slightly Soluble, and Practically Insoluble.

a) Silver nitrite (AgNO₂), S = 0.27 M. Answer is

b) Lithium Phosphate (Li₃PO₄), S = 3.4 x 10^-3 M. Answer is

c) Aluminum Fluoride (AlF₃), S = 8.6 x 10^-2 M. Answer is

d) Tin (II) Iodide (SnI₂), S = 2.9 x 10^-2 M. Answer is

The following reaction is similar to the breathing cycle of plants:

4KO2(s)   + 2CO2 (g)   ®2K2CO3 (s) + 3O2 (g) Calculate change inH for the above reaction from the following data:

change in H (kcal)

K(s)   + O2 (g)   ®KO2 (s)                                                           -134.0

KOH(s)   + CO2 (g)   ®KHCO3(s)                                                -33.5

2KHCO3(s) ®CO2(g) + H2O(g) + K2CO3(s) +33.0

2K(s) + 2H2O(g)   ®2KOH(s) + H2 (g)                                         -88.0

H2 (g)   + 1/2O2(g)   ®H2O(g)                                                      -57.8

Draw and name the ten seven-carbon long chains for octyne (C₈H₁₄). Hint: each isomer will have a single methyl substituent. (Place a star next to each chiral carbon)

1.) Explain the following observations in terms of shifting equilibria by Le Chatelier's Principle. Write the equation for the equilibrium involved in each case.

a.) barium chromate, BaCrO4, is insoluble in basic solution but dissolves readily in acidic solution.

b.) The addition of NaOH to the iron (III)- thiocyanate equilibrium causes the red color to disappear and a rust colored precipitate to form.

c.) The solubility of lead chloride, PbCl2, in 0.10 M HCl is much lower than in pure water.

d.) Limestone, CaCO3, is an insoluble salt but will dissolve in acid.

e.) For part C, how does the rate of the reaction vary as the temperature is increased? Explain.

Sodium carbonate (1.3579 g) was dissolved in deionized water to give a solution with a total volume of 100.0 mL. What was the pH of the resulting solution?

Calculate the pH of the solution that results from mixing 35.0 mL of 0.18 M formic acid and 70.0 mL of 0.090 M sodium hydroxide. ( value for formic acid is 1.8*10-4.)