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Toluene (C6H5CH3) is a liquid compound similar to benzene (C6H6). Calculate the mole fraction of toluene in the solution that contains 138 g toluene and 106 g benzene.
What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself and that the specific heat of the solution is the same as that of pure water.
A bottle containing 315 g of cleaning solution is used for carpets. If the cleaning solution has a specific gravity of 0.850, what volume of solution was used?
The half-life of 137Ce is 30. years. If we have 150.000 g of 137Ce now, how many grams of Ce will remain in 150. years?
A solution is made by dissolving 3.14g of NaCl in 79.9mL of water. What is the concentration of sodium chloride in units of weight/volume percent?
what volume of 420 ml of hydrogen occupy if the temperature is raised from 0 C to 95 C?
30.3 g of chromium(III) oxide reacts with 10.8 g of aluminum to produce chromium and aluminum oxide. If 20.7 g of chromium is produced, what mass of aluminum oxide is produced?
what is the molarity of the solution formed by mixing 0.20 mol of sodium hydroxide with enough water to make 150 ml of solution
The wavelength corresponding to threshold frequency to tungsten surface is 230nm . Calculate the kinetic energy of the photoelectron ejected from the surface of tungsten metal.
Calculate the mole percent composition of the mixture. Assume that the response of the detector (area per mole) is the same for each component.
Draw the enantiomer of cis-1-chloro-3-methylcyclopentane which is R at C-1. 1) What is the configuration of this molecule at C-3 (R and S)?
A chemist wants to make 6.0L of a .350M CaCl_2 solution. What mass of CaCl_2 should the chemist use?
The element lanthanum has two stable isotopes, lanthanum-138 with an atomic mass of 137.9 amu and lanthanum-139 with an atomic mass of 138.9 amu
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