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How many milliliters of 0.2 M KOH are required to titrate completely 650 ml of 0.05 M citric acid?
what are some examples of situations where recrystallization would not be suitable to purify an organic compound
several questions regarding the volatility, bioaccumulation potential and toxicity of BTEX compounds commonly present in the light fraction of gasoline. You find the following data from a reference book (E. R. Weiner, 2000) and try to help him.
The complete combustion of pentane releases 243 kj on the basis of this information calculate the value of delta H for the complete combustion of one mole of pentane
What is the half life of the decomposition of A at 60C? e)If the concentration of a is found to be 2.78 x 10^-3 mole/L at t= 1.80 s and 60C, what is the initial concentration of a at 60C?
Assume that 1.14 mL of liquid remains in the flask each time it is emptied, and that this volume of rinse water remains in the flask prior to preparation of the KNO3 solution. Although in practice rinse volumes are generally approximate, for purpo..
In a combustion experiment, .73g of an unknown hydrocarbon was burned in the presence of excess oxygen. This reaction produced .452 g CO2 and .087 g H2O. How many moles of carbon were in the original hydrocarbon sample
A sample of gas (24.2 g) initially at 4.00 bar was compressed from 8.00 L to 2.00 L at constant temperature. After the compression, the gas pressure was ________ bar.
Calculate ?H, q and w when 1.00 mol of helium at 5.00L and a temperature of 298.15K is expanded and heated simultaneously
What is the maximum mass of sucralose (C12H19Cl3O8) you can add to 2.50 kg of pure water and still have the solution freeze? Assume that sucralose is a molecular solid and does not ionize when it dissolves in water.
The specific heat of iron is 0.451 J/g·°C. If 12.04 kJ of heat energy are applied to 180.0 g of iron at an initial temperature of 22.0°C, what is the final temperature of the iron
The combustion of 53.4 g of butane (c4h10) produces 95.6 g of co2. what is the percent yield of the reaction
Exactly 5.02 grams of an unknown gas was sealed in a 3.0 L flask at 37.0oC and a pressure of 1.25 atm. Which one of the following is most likely to be the unknown
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