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An exothermic reaction liberates 7.58 kJ of heat in a coffee cup calorimeter containing 157 grams of solution. The temperature of the solution in the calorimeter increases by 11.2°C. How much heat was absorbed by the calorimeter? Assume the specific heat of the solution is 4.184 J/g·°C.
223 J
7.36 kJ
657 J
5820 J
-223 J
Does a mutation causing a substitution of one base pair in a strand of DNA necessarily result in a new amino acid in the protein coded for that gene? Explain.
A certain aldose is added to an aqueous sodium hydroxide solution. After equilibrium is reached it is found that there are 3 open chain sugars in the solution. Draw the enediol that is believed to be the intermediate.
In any chemical reaction, the quantities that are preserved are what?
How many ml of 0.318 M K2Cr2O7 are needed to completely oxidize 179 ml of 0.768 M tin (II) chloride to tin (IV)?
what are some difference or similarity in the type of inhibition caused by heat, acid or base and heavy metal ions on enzyme activity.
Which of the following molecules are polar? (There may be more than one; choose ALL the polar molecules for full credit)
At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average power of approximately 5.00 kJ·s-1·m-2. If the sunlight consists of photons with an average wavelength of 510.0 nm
The gas remaining in the bottle slowly warms up to 285K. what is the final pressure in the bottle for a diatomic gas for which C(v,m) = 5R/2?
A protein biochemist attempted to determine the amino acid sequence of a decapeptide. Use the results from the trypsin, chymotrypsin, and cyanogen bromide treatments to suggest the amino acid sequence of this decapeptide.
Write the unbalanced equation for the formation of ozone gas from oxygen gas. (Include states-of-matter under SATP conditions in your answer.)
Calculate the pH of a solution that is 0.20 M HOCl and 0.90 M KOCl. In order for this buffer to have pH=pKa, would you add HCl or NaOH?
The steam is comes out of the feed water at 200 C. The water at a flow rate of 500 kg/h enters the feed water heater at 20C. Calculate the feed water exit temperature.
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