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Calculate the mole fraction of ethanol, C2H5OH, in a solution that contains 230. grams of C2H5OH and 312 grams of benzene, C6H6.
0.44
0.56
0.57
1.8
2.3
Calculate the volume of 6.0 M sulfuric acid H2SO4 solution required to neutralize the excess potassium hydroxide, KOH, solution from the first step of the synthesis. Indicate clearly your calculations and reasoning.
find calories and joules lost when 75.0 g of water H20 cools from 86.4 degrees celsius to 2.1 degrees celsius.
Can someone please draw the scheme of Selenium: "A sample is preserved in the field at 4oC. The sample aliquot is oxidized, in acidic persulphate
Calculate the amount of heat energy required to convert 55.0 g of water at 62.5 degrees Celsius to steam at 124.0 degrees Celsius
a gas mixture consists of N2, O2, and Ne where the mole fraction of N2 is .55 and the mole fraction of Ne is .25. If the mixture is at STP in a 5.0 L container, how many molecules of O2 are present.
liquid mercury at atmospheric pressure and 298K to 1.25L at constant temperature requires 46.6kbar (kilobars) of external pressure. What is the isothermal compressibility of Hg(l)?
For the cell as written, what is the voltage after the addition of the following volume of NaI solution? The reduction potential for the saturated calomel electrode is E = 0.241 V. The standard reduction potential for the reaction
How many grams of dry NH4Cl need to be added to 2.10 L of a 0.500 M solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.76? Kb for ammonia is 1.8*10 ^-5.
what is the molality of a solution of 10g benzophenone and 1mL of cyclohexanone
Determine the molar mass of chloroform gas if a sample weighing .389 grams is collected in a flask with a volume of 102cm cubed at 97 degrees Celsius. The pressure of the chloroform is 728 mmHg.
Calculate the standard cell potential given the following standard reduction potentials: Al 3+ +3e ? ?Al;E ? =?1.66 V Fe 2+ +2e ? ?Fe;E ? =?0.440 V
When 0.170 g of the hydrate CaCl2•xH2O is heated, 0.128 grams of anhydrous CaCl2 remains. What is the value of x in the formula for the hydrate?
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