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The flow-through fraction in ion exchange chromotography of amino acids in which a cation exchange resin was used is expected to contain mainly:
a. neg charged amino acidsb. pos charged amino acidsc. polar amino acidsd. non-polar amino acidse. all are correct
Sulfur dioxide can be produced in the laboratory by the reaction of hydrochloric acid and sodium sulfite. The skeleton equation for this reaction is: Na2SO3 + HCl --> NaCl + SO2 + H2O
How many dimes do you need to buy as much candy as possible? How much should all these dimes weigh? How many pieces of candy could you buy? How much would this candy weigh? How many pieces of candy could you buy with twice as many dimes?
If 26 of 6.6 was spilled, what is the minimum mass of that must be added to the spill to neutralize the acid?
At what temperature will air (MW=29) have the same density as helium at 300 K, both gases at the same pressure.
A sample consisting of 3.0 mol of ideal gas molecules at 200K at 2.00 atm is compressed reversibly and adiabatically until the temperature reaches 250K.
Which of the following statements is true regarding chiral carbons with R configuration? a. plane polarized light is rotated clockwise b. plane polarized light is rotated counterclockwise
upon evaluating the contents of a solution, declared that it was a 32 molar solution of ethanol in water. Why is this incorrect?
Write the cell notation for the voltaic cell that incorporates eachof the following redox reactions.
Geologists can estimate the age of rocks by their uranium-238 content. The uranium is incorporated in the rock as it hardens and then decays with first-order kinetics and a half-life of 4.5 billion years
A swimming pool contains 88,000 liters of water and it having a surface area of 5 meters by 10 meters. It is observed that when this swimming pool is heated by the Sun for six hours.
A gas occupies 22.4 L at STP and 14.5 L at 100°C and 2.00 atm pressure. How many moles of gas did the system gain or lose?
What is mass (in g) of copper can be recovered from 49.9 mL of a 0.628 M solution of copper(I) chloride and excess hydrogen
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