Determine the isotopic mass of 41k
the three naturally occurring isotopes of potassium are 39k, 38.963707u; 40k, 39.363999 u; and 41k. the percentage natural abundances of 39k and 41k are 93.2581% and 6.7302%, respectively. determine the isotopic mass of 41k.
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A single extraction with 100 mL of CHCl3 extracts or removes 88.5% of the weak acid, HA, from 50& ; mL of aqueous solution. What is the partition coefficient, K, for HA at a pH = 3.00? The Ka for HA is 3.5 x& ; 10-5.
a 0.5224-g sample of an unknown monoprotic acid was titrated with 0.0998M of NaOH. the equivalence point of the titration occurs at 23.82ml. Determine the molar mass of the unknown acid
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At pH 4, histidine (pKs are α-carboxylate 1.8, α-amino 9.33, 6.04 imidazole)would have what charges on each functional group and what would be the net charge?
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