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The Managing Director of a well-known company on Wall Street thrives on a diet of fruit jam, bread, pasta, and coffee. She exercises intermittently. One day she decides to go to her primary healthcare provider for a routine checkup. The healthcare provider recommends that she take the Benedict's test. Assume that the glucose evels of the patient are high.
State the results that the test would indicate (specify the color of the solution).
State the composition and the properties of the ketohexose derived from fruit jam.
Describe the manner in which ketohexose acts as a reducing sugar in the test.
the concentration fo certain sodium hydroxide solution was determined phthalateabbreviated as khp. khp is an acid with
Then 5.0mL was withdrawn and diluted to 200mL. The spectrum of this solution exhibited a maximum absorbance of 0.642 units at 554nm in a 2cm cell. The molecular absorbance , e, is 423 M-1cm-1. What is the mass of the analyte in grams
a saturated solution contains 11.0 g NaBrO3 in 40.0 mL of water at 0 degree Celsius. What is the solubility in g solute/(100 g H2O)? Calculate the mole fraction at this temperature.
a stainless steel spoon weighs 25.2 g and is at a temperature of 18.5 oc. it is immersed in 81.7 ml of hot coffee t
Calculate the altitude at which only 10% of the mass of the atmosphre is above and 90% of the mass of the atmosphere is below.
Draw orbital-filling diagrams for atoms with the following atomic numbers. Show each electron as an up or down arrow, and use the abbreviation of the preceding noble gas to represent inner-shell electrons
a balloon is filled to a volume of 7.00x102 ml at a temperature of 20.0 degrees c. the balloon is then cooled at
Carbon dioxide is removed from the atmosphere of space capsules by reaction with a solid metal hydroxide. Theproducts are water and the metal carbonate
used to fill a weather balloon in order to lift equipment into the stratosphere. To what maximum pressure (in atm) could a 271 L balloon be filled?
Explain why recrystallization, as a general technique, is usually effective at removing a few percent of impurity, even though the solubility (g/mL) of the impurity might be similar to that of the main component.
If you had excess chlorine, how many moles of of aluminum chloride could be produced from 29.0 of aluminum
1. why should activated carbon be used during a recrystallization. 2. if a little activated charcoal does a good job removing impurities in a recrystallization, why not use a large quantity
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