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17the decomposition of dinitrogen pentaoxide has an activation energy of 102 kj/mol and delta H =+55 kj/mil. What is the activation energy for the reverse reaction
a Oxygen is a common oxidizing agent in nature. What changes in the oxidation number of oxygen must occur if it is to be an oxidizing agent? explain
Ammonia will react with oxygen in the presence of a copper catalyst to form nitrogen and water. From 164.5 degrees C to 179 degrees C, the rate constant increases by a factor of 4.27. What is the ac
An isolated field of corn was found to be segregating for yellowand white endosperm. Yellow is governed by a dominant allele and white by its recessive allele
Dinitrogen tetraoxide, N2O4, decomposes to nitrogen dioxide in a first-order process. If k=2.5 x 10 to the 3rd s-1 at -5degrees C and k=3.5 x 10 to the 4th s-1 at 25 degrees C, what is the activatio
Liquid nitrogen trichloride is heated in a 2.88-L closed reaction vessel until it decomposed completely to gaseous elements. The resulting mixture exerts a pressure of 766 mmHg at 75°C.
The ability of certain people to taste a chemical called PTC is governed by a dominant allele T, and the inability to taste PTC byits recessive t
Several rate constants were measured for a particular reaction at several temperatures. It was found that k = 0.0173 at 923 K, and k = 0.00919 at 773 K. What is the activation energy, Ea , for this
A sample of Rambouill breed in Idaho gave the following data: 891 white and 9 black, Find the allele frequencies
A sample of an unknown gas effuses in 10.1 min. An equal volume of H2 in the same apparatus under the same conditions effuses in 2.16 min. What is the molar mass of the unknown gas
A first-order reaction has a half-life of 20 minutes. Starting with 1.00 x 10 to the 20th molecules of reactant at time t=0, how many molecules remain unreacted after 100
A student measures 0.2452 g of a monoprotic solid acid, and dissolves the solid in water to make 100.0 mL of solution. The entire solution is titrated to a phenolphthalein endpoint with 45.09 mL of
The decomposition of hydrogen peroxide is a first-order process with a rate constant of 1.06 x 10-3 min -1. How long will it take for a concentration of H2O2 to drop from .0200M to .0120 M
List the individual steps used in constructing a Born - Haber cycle for the formation of barium iodide (BaI2) from the elements. Which of the steps would you expect to be exothermic
The pH at whichthe predominant form of an amino acid has a net of 0 is known asthe pI, Estimate the pI of glutamic acid
The result of doubling the inital concentration of x will be to? a) shroten the half-life of the reaction b) increase the rate of constant of the reaction c) decrease the rate constant of the reacti
The dominant allele results in Rh - haspositive individuals, whereas the homozygous recessive conditionresults in Rh - negative individuals
What is the pH of a solution which results from mixing 150 mL of 0.50M acetic acid and 150 mL of 0.50M sodium hydroxide at 25oC?
A reaction is second-order with respect to the reactant R. Which of the following plots will produce a straight line? A) [R] vs. 1/time B) 1/[R] vs. time C)[R]2 vs. time D)1/[R]2 vs. time E) In[R] v
Why do mutations that inactivate the 3'-5' exonuclease activity of DNA polymerase III greatly increase the frequency of mutations
You titrated 1.740 g of a solid unknown acid that was dissolved in 100.0 mL of distilled water; the initial pH value was 2.5. You found that pH=pKa=4.2 when 12.50 mL of NaOH had been added. The conc
Draw a 3-dimensional sketch, using dashes and wedges. Be sure to show all atoms (no line drawings), to draw pi bonds (with sets of overlapping p orbitals) and to include the orientation of lone pair
Supposethey added the enzyme to a solution of 90%CTP and 10%UTP, and then used a cell-free system of protein synthesis to make peptidesaccording to the sequences in their synthetic RNAs
Peptide hormones must bind to receptors on the extracellular surface of their target cells before their effects are communicated to the interior. In contrast, receptors for hormones such as estrogen
Inexperienced athletes might try consuming three high energy drinks just before a race but veteran marathon runners know this would impair their performance. Why?