Determining the same mass of solute
Mass of solvent=134.4 g/mol
The same mass of solute is dissolved in 9.82 g of t-butanol instead of cyclohexane. What is the expected freezing pt. change of this solution?
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If 32.7 mL of 0.225 M KOH is required to completely neutralize 28.0 mL of a CH3COOH solution, what is the molarity of the acetic acid solution?
From a consideration of the Lewis structure of the thiocyanate ion, SCN-, in which carbon has a double bond with both the sulfur and nitrogen atoms, the formal charges on the sulfur, carbon, and nitrogen atoms are, respectively,
The other plate was placed in a chamber containing ethyl acetate, and after developed it showed two spots, one with an Rf value of 0.15 and one with an Rf value of 0.46. Explain how this occurred
A sample of 0.836 gm of unknown compound containing barium ions Ba2+ is dissolved in water and treated with an excess of Na2So4. If the mass of BaSo4 precipitat formed 0.7403 gm, what is the percent by mass of Ba in the orginal unknown compund
A solution of a specific vitamin has ?max = 223 nm and a concentration of 8.31 × 10-7 M. The absorbance of the solution at 223 nm is A = 0.180. What is the molar absorptivity of the vitamin at 223 nm?
How many unpaired electrons would (Re(CN)6)-3 and (MnCl6)-4 have give electron configurations for each ion in terms of the t2g and eg sets.
What is the concentration of the ammonium ion (in M) in a solution which contains 51 g ammonium sulfide in 635 mL of solution
A glycine buffer is prepared by mixing 100 mL of 1.0M glycine, pH 6.0, with 100 mL of 0.5M NaOH and 300 mL of water. The pKa values for glycine are 2.4 and 9.6. What is the concentration of the buffer solution?
Question: In a reaction, 34.6 g of chromium(III) oxide reacts with 12.3 g of aluminum to produce chromium and aluminum oxide. If 23.7 g of chromium is produced, what mass of aluminum oxide is produced?
Calculate the fraction of lidocaine present in the form LH . MOPS Buffer Ka = 6.3 × 10-8. Lidocaine Kb = 8.7 × 10-7
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