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HPLCIn HPLC, how often should I need to run standard with samples? Why? If the retention time is changed with real samples compared to standard, how can I determine if the peak with changed retention time is samples are actually compounds A and B?
Write the structures of the saytzeff elimination
A gas has a pressure of 4.82035 atm when its volume is 2.75 L. What will the pressure be when the volume is changed to 1.91015 L.
calculate how much CaCN2 is required to form 12.6 moles of ammonia? Given that the percent yield is 65.8%?
A gas mixture being used to simulate the atmosphere of another planet consists of 324 mg of methane, 217 mg of argon, and 228 mg of nitrogen.
A buffer (pH 3.70) was prepared by mixing 1.00 mole of formic acid and 1.00 mole of sodium formate to form an aqueous solution with a total volume of 1.00 L.
how many moles can be produced from 2.5 moles of Ag2CO3 and final temperature of the calorimeter contents is 23.83°C After dissolution of the salt.
A 1.80-L flask is filled with propane gas (C3H8), at 1.00 atm and -19.4°C. What is the mass of the propane in the flask.
Carbon monoxide gas reacts with hydrogen gas at elevated temperatures to form methanol according to this equation. CO(g) + 2 H2(g) CH3OH (g)
The products of the fastest inactivation process are as explain the mechanism is accountable for the making of the products.
What is the change in pH when 0.005 moles of HCl is added to 0.100 L of a buffer solution that is 0.100 M in CH3CO2H and 0.100 M NaCH3CO2? The Ka for acetic acid is 1.8 x 10-5.
Find the volume of a molar solution - What volume of a 0.250 molar solution of silver nitrate, AgNO 3 , is required to react with 18.6g of potassium phosphate
Standard Enthalpies of Formation: acetic and AB2 = - 25.65 kCal/ mole,A++ = -8.65 k Cal/ mole,Temperature = 10 Degree Celsius determine pK,
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