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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?
Explain the function of acetylation on the histone tails. What do you think would happen if you mutated the lysine amino acid on the tail of a histone protein
A student titrated a .4630g sample of unknown monoprotic acid with 0.1060m NaOH. Using a derivative curve, the student found, the equivalence point volume to be 28.70mL of NaOH
What is the value of the equilibrium constant for transformation of carbon from graphite to diamond at 810.0 C?
In calibrating a drop counter, a student had an initial buret reading of 0.41 mL and a final buret reading of 4.71 mL after dispensing 75 drops from a buret.
In hamsters, black coat color (B) is dominant to white coatcolor (b). A homozygous black hamster is mated with aheterozygous black hamster
The first three reactions of the b oxidation pathway are similar to three reactions in the Kreb's cycle. Which three and why are they similar
A machine is designed to fill jars with 16 ounces of jelly beans. A buyer suspects that the machine is not filling the jars completely, Clearly identify the necessary steps in your hypothesis test
The student found that 8.67mL of NaOH solution was needed to titrate a 0.0544g sample of the acid to the equivalence point. Calculate the mass of unknown required for a 30.0mL titration.
A mouse has genotype AaBb. He inherited both dominant alleles (A and B) from his mother and both recessive alleles (aand b) from his father
In constructing an oligonucleotide probe based on information from a protein's sequence, The synthesis of most proteins starts with methionineor a derivative there of, so a methionine codon assures o
Describe what subcloning(and how it is used) and vectors are, how a protein couldbe isolated using affinity chromatography
A 0.1293 g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 1769 J/°C. The calorimeter contains exactly 261 g of water, and the temperature i
How does systematics and phylogeny show relatedness between species, molecular systematics lend support to Darwin'sideas
Calculate the heats of combustion for the following reactions from the standard enthalpies of formation listed in Appendix 3. (?H°f (HgO(s)) = -90.7 kJ/mol and ?H°f (FeO(s)) = -272 kJ/mol.)
Methanol, ethanol, and n-propanol are three common alcohols. When 5.00 g of each of these alcohols is burned in air, heat is liberated. Calculate the heats of combustion of these alcohols in kJ/mol.
what is the effect of amount of sleep on IQ testscore, independent variable, dependent variable, Cotrolled variable
At equilibrium the concentration of NO in the vessel is 0.161M. At equilibrium the vessel contains N2, H2O and H2. What is the value of the equilibrium constant Kc for the following reactions