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If 0.015 M NaCl shows conductivity of 12,000 units, based on "total ion concentration" what conductivity should be observed for 0.030 M Na2SO4?
Analysis of the products revealed two methylated sugars: 2,3,6-tri-O-methyl-D-glucose, 2,4-di-O-methyl-D-glucose and 2,3,4,6-tetra-O-methyl-D-glucose. The ratio of these sugars was 20:1:1. determine the structure of the polysaccharide?
Calculate the pH of a buffer that contains 0.270 M hydrofluoric acid (HF) and 0.180 M cesium fluoride (CsF). The Ka of hydrofluoric acid is 6.8 x 10^-4.
What monosaccharide is the C-2 epimer of alpha-D-galactose? Are these two molecules diastereomers?
A chemist found that a reaction did not take place under any set of conditions. If the chemist added a catalyst, would the reaction then occur?
What salt is produced in each of the following neutralization reactions?
A sample of argon gas occupies a volume of 950 mL at 25.0°C. What volume will the gas occupy at 50.0°C if the pressure remains constant?
Nitric acid is not only a strong acid but also a strong oxidizing agent. In hot concentrated acid solution, the reaction with zinc is: 3 Zn(s) + 8 HNO3 ? 3 Zn(NO3)2(aq) + 2 NO(g) + 4 H2O
What products would expect from acid-catalyzed hydration of the following alkenes?
Molarity is only one of many ways to express concentration. Another is percent mass per volume or %(m/v). For example, vinegar usually contains about 5 %(m/v) acetic acid(5g acetic acid/100 mL vinegar)
A sample of gas occupies 721 mL at 1.00 atm. The pressure is increased to 1.1 atm (the temperature stays the same). What is the new volume of gas in mL?
A solution of ethanol (C2H5OH) in water is prepared by dissolving 67.5 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
Describe the similarities and differences between gas-sensing potentiometric electrode and pH membrane potentiometric electrode
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