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What is the purpose of adding phosphoric acid before titration of the iron (III) with potassium dichromate?
A solution is made by combining 500ml of .10M HF with 300ml of .15M NaF. What is the pH of the solution? (Ka=7.2e-4 for HF)
A certain plant material is known to contain mainly trimyristin and tripalmitin in approximately equal amounts. Tripalmitin, the structure of which you should look up in a reference source,
If 8.00 kJ of heat are added to 200. g of water at 20.0 C, what is the final temperature of the water?
If a sodium hydroxide solution were added to a solution containing lead(II) ions, sodium ions, nickel(II) ions, and potassium ions, which ion(s) would remain in the supernatant? (Select all that apply.)
the balloon reaches an altitude of 100m, where the pressure was 658 mmHg and the temperature was -8c. what was the volume in liters of the ballon at these conditions?
How much heat is associated with the burning of 3.52 g of methane in the following unbalanced reaction: CH4(g) + O2(g) ?CO2(g) + H2O(g)
A solution is prepared by mixing 10g of water with 10g of ethanol. What is the mole fraction of water in the vapor phase at 30 degree C. The vapor pressure of water at 30 degree C is 32 torr and ethanol is 78 torr. The molar mass of water is 18.02..
Why exactly are oxidation reactions one in which a oxygen is inserted into a bond, hydrogen is removed from a bond, and a more electronegative atom is inserted in the bond, replacing a carbon or a hydrogen
celcius of a solution prepared by dissolving 0.0550 mole of a sodium acetate in 1.00 L of 0.250 M acetic acid.
A gas originally at 30.0 C and 1.00 atm pressure in a 3.9L flask is cooled at constant pressure until the temperature is 11C. The new volume of the gas is _______ L.
The following compound can be used to make an addition polymer. Show the general structure of the polymer that it will form. Ch2=CH(COOCH3)(CH3)
Having trouble with a couple of study guide questions for Chemistry. Hoping someone can assist: PART 1: Calculate the pH of a buffer solution that is 0.250 M in HCN
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