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A gaseous mixture of O2 and N2 contains 30.8 percent nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 565 mm Hg?
the beers law slope for the fe-phenanthroline complex is found to be 0.2100 lmg fe. the absorbance of the diluted
What characteristic H NMR absorptions would be expected in the aliphatic region for 9-hydroxyfluorene
Which of the following has the smallest mass?
Dipole moment, Formaldehyde has a very large dipole moment (2.33 Debye) whereas carbon monoxide has a very small dipole moment (0.11 Debye)
Compare the structure of propranolol with noradrenaline and identify which features are similar in both molecules. Suggest why this molecule might act as an antagonist rather than an agonist
In the representative elements, how does the stability of the lower oxidation state change as you go down a group and is there a different trend for transition metals
Naturally occurring chlorine is composed of 35Cl and 37Cl. The atomic weight of chlorine is 35.453. What are the percentages of 35Cl and 37Cl in naturally occurring chlorine. Assume that the mass of 35Cl and 37Cl are 35 and 37 amu respectively.
a researcher requires 20l if a buffer solution with pH=4.25. How many moles of formic acid, and sodium fomate, could be dissolved in the solution to make this buffer, if none of the equillibrium concentrations should be under 0.100M?
What is the pH after 0.150mol of HCL is added to the buffer from part A? Assume no volume change on the addition of the acid.
question what is the importance of chemistry to agriculture write summary of total one page and include references as
Calculate the amount of copper sulfate in solution formed by the reaction of.500g of elemental copper with excess silver sulfate.
The atomic mass of silicon is 28.0855 amu and the natural abundance of 29Si is 4.68%. What is the natural abundances of 28Si
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