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If all human body cells have the same DNA molecules with the same genes, then what accounts for differences in cell types (red blood cells, skin cells, nerve cells, muscle cells, ets)?
What was the pH at the end of the reaction? e) What would the final pH be in the absence of any buffer?
The Winkler titration for the determination of dissolved oxygen involves the treatment of the sample with iodide ion (I-) in the presence of manganese ion catalyst (Mn2+) as follows.
Calculate the enthalpy change in oxidizing this mixture in air if the reactants are at 298 K and the products are at 1200 K.
The predominant isotope of gold ^197, 79 Au, has an experimentally determined exact mass of 196.967 amu. What is the total nuclear binding energy of gold in electrovolts per atom
If the temperature in the laboratory is 22.3oC and the atmospheric pressure is 0.931 atm, what volume would be occupied by the carbon dioxide produced in this reaction (in cm3)?
Compute the molality of a solution made by mixing 16.9 g of urea, (NH2)2CO in 421.01 g of water.
Determine the pressure of the gases trapped in the closed end of a manometer apparatus if the water column which separates the closed end from the open end is 10.55 cm higher on the closed end than the open end, and if the barometric pressure at t..
The combustion of butane can be represented by the following equation:__C4H10 (g) + __O2(g) ? __CO2(g) + __H2O(g)
Although the mechanism of the coupling process is not well understood, it is known that ratre appears to depend on the square of the concentration of the halide.
It requires 251 J to melt 2.22 g of sodium metal at its normal melting point of 98°C. Calculate the molar heat of fusion of sodium.
The reaction caused the temperature of the water to rise from 21.0 to 24.7 C. What is the enthalpy of this reaction. Assume that no heat is lost to the surroundings or to the coffee cup itself.
Question- Enough of a monoprotic acid is dissolved in water to produce a 0.0103 M. The PH of the resulting solution is 2.45. Calculate the pKa for the acid.
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