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If you perform two column chromatographic separations in two columns of equal size, one column packed with a silica gel of smaller size than the other, would the outcome of the separation be different?
silver has an average atomic mass of 107.87 u. if 48.18 of ag exists as ag-109 108.9047 u what is the identity and the
In countries where potassium iodide is added to salt, iodine deficiency or goiter has been almost completely eliminated. The recommended daily allowance (RDA) for iodine is 150 pg/day.
assume that you have 1 2 5 and 10 ml pipets and a 25 ml volumetric flask. describe in detail how you would prepare a
10.0 mL of a 0.30 M sodium phosphate solution reacts with 20.0 mL of a 0.20 M lead(II) nitrate solution (assume no volume change). What is the concentration of nitrate ions left in solution after the reaction is complete
The vapor pressure of chlorine dioxide (ClO2) is 155 Torr at -22.75 ? C and 485 Torr at 0?C. What is the normal boiling point of chlorine dioxide?
Sleeping pills often contain barbital, which is weakly acidic (pKa = 8.00). For analysis of the barbital content of a sleeping pill, a titration is carried out with strong base. It takes 12.00 mL of 0.200 M base to reach the stoichiometric point.
below which there is too little fuel to support combustion. For propane, the LFL is 2.1 mol-%. What is the mol fraction of propane in the air at the stoichiometric concentration?
How many milliliters of 0.5 mg/mL BSA will you use in each tube to get the range of 0-50 micrograms that you want?
1. Which kinds of alcohols produce aldehydes when oxidized 2. Which kinds of alcohols produce ketones when oxidized
A solid aluminum sphere has a mass of 87g. How do you use the density of aluminum to find the radius of the sphere in inches
what is the pH of the benzoic acid solution prior to adding sodium benzoate? B. how many grams of sodium benzoate should be added to prepare the buffer? neglect the small volume change that occurs when the sodium benzoate is added.
What will the following peptides look like structurally at pH 1, pH 7, pH 12. (You will draw 3 structures for each.)
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