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You have a certified "5 ppm Fe standard" that you obtained from NIST. By your method you measured it to be 4.8 ppm.
a) Discuss your measurement precision
b) Discuss your measurement bias
In the near future, the college will attempt to reduce the cost of chemicals used in campus laboratories. One option suggests the chemistry department use household chemicals instead of expensive laboratory grade materials were ever possible.
How many mL of a .1 N solution of NaOH must be added to a 25 mL solution of .1 N HAc to obtain a pH of 9.75? What is the concentration of HAc at this pH
which of the following is NOT a vitamin that is used by cells to produce a cofactor requires by alpa-ketogluterate dehydrogenase
Suppose 108.3 g of hydrogen peroxide decomposes and all of the oxygen gas is collected in a balloon at 1.00 atm and 25oC. Determine the volume of the balloon.
Calcium hydride reacts with water to give gaseous hydrogen and calcium hydroxide
If the antiacid selected for the analysis is know to contain only milk of magnesia how could this procedure be midified
Reduction of Conjugated Ketones with Sodium Borohydride, Suggest mechanisms of reaction for 1,2-addition and for conjugate addition (1,4-addition) of NaBH4 to a conjugated
The pickering series for the He+ ion corresponding to a series of transitions, in which electrons fall into the level with n=4. Find The longest wavelength transition of the pickering series in Angstroms
As conjugated dyes get longer, two effects compete. The Equation, ?= 8mcL^2/h(2ni+1) indicates that as ni increases, the absorption wavelength should decrease, but as L increases, the absorption wavelength should increase. Which one wins and why?
In a separate experiment, an empty flask is weighed, 35.3 cm3 of the lubricating oil is poured into the flask and the flask is reweighed. If the scale reading was 124.8 g in the first weighing, what would it be in the second weighing
Calculate the amount of heat required to completely sublime (turn from solid to gas) 25.0 g of solid dry ice (CO2) at its sublimation temperature. (the heat of sublimation is 32.3 kJ/mol)
The following reaction equation depicts the reaction between hydrazine (N2H4) and dinitrogen textroxide (N2O4) to form diatomic nitrogen and water vapor.
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