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A student examined a 0.2078g sample containing aspirin using 0.1014M NaOH. The student obtained a % purity of 76.1%. Compute the volume of NaOH that is required in order to reach the end point of the reaction. Molar mass for aspirin = 180.16g/mol
The vapor pressure of the benzene is 92.00 torr at this temperature; The vapor pressure of the solute is negligible. What is the vapor pressure of the solution?
Because of the movable plunger on a syringe, the gas inside the syringe can be held at a constant pressure of 1.00 atm while allowing the volume of the gas to increase or decrease.
calculate the number of excess reagent units remaining when 100 C4H10 molecules and 611 O2 molecules react?
how many grams of dry need to be added to 2.30 of a 0.400 solution of ammonia to prepare a buffer solution that has a
A sample of gas occupies a volume of 364 mL at 1.28 atm and 27 oC. Calculate the volume of the gas if its temperature is changed to 57.0 oC while its pressure is held constant.
Describe the reaction as a balanced chemical equation that occurs when methane which is a natural gas, CH4 is burned in the presence of excess oxygen, O2. If 100g of Butane are reacted with unlimited amounts of oxygen
0.8 moles of acetic acid (weak acid) is added to 1.25 liters of water and the pH is adjusted to 5.8. what is the concentration of acetate ion
in a particular titration experiment a 25.0 ml sample of an unknown monoprotic acid required 30.0 ml of .200 m naoh for
Compare the primary, secondary, and tertiary structures of a protein with the structure of a telephone
Explain what is the pH at the equivalence point in the titration of 10.0mL of 0.41 MHZ with 0.200 M NaOH. Ka = 3.7 × 10-5 for HZ.
when 2 moles of mg3n2 are allowed to react with water to form ammonia gas and magnesium oxide how many moles of h2o are
How much energy in J is needed to convert 48 g of liquid ethanol at 67 oC to vapor at 97oC. You might need to know that: mp = -114 oC and bp = 78oC The heat of fusion is 4.6 kJ/mol and the heat of vaporization is 46.0 kJ/mol. Finally, the specific..
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