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When 3.56 g of an unknown hydrocarbon was dissolved in 125 g of benzene, the freezing pointof the solution was found to be 4.41oC. Analysis of thehydrocarbon showed that it contained 93.71% carbon (by mass) and6.29% hydrogen. Determine the molecular formula of the unknownhydrocarbon.
calculate the value of DGo in kJ for the combustion of 1 mole of methane to form carbon dioxide and gaseous water at 298 K.
limestone is decomposed by heating to quicklime and carbon dioxide. Calculate how many grams of quicklime can be produced from 1.0 kg o limestone.
ideal gas in 2.0 L what will be the volume of the gas if the pressure on the container is doubled while the temperature is reduced from 400 K to 200 K.
What mass of ammonium chloride should be added to 2.65 L of a 0.165 M NH3 in order to obtain a buffer with a pH of 9.60
In preparing solutions of the unknown acids, a much smaller mass of acid is used than in preparing an equal volume of KHP solution to achieve about the same concentration. Why is this
calculate the heat given off when 177 g of copper cools from 155.0 celsius to 23.0 celsius. the specific heat capacity
How much heat is required to warm 221 g of ice from -46.1°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C
explain if you can use an integrated rate law to find the orders of each reactant in a reaction with more than one reactant
If the complex [Fe(NH3)6]2+ is paramagnetic, can you tell whether it is an octahedral or tetrahedral complex? What if the complex were diamagnetic
The standard enthalpy and entropy for a slightly soluble salt at 25 degrees C were determined to be 71 kJ and 49 J/K respectively. Calculate the standard Gibbs Free Energy for this salt.
Explain how many milliliters of water vapor, measured at 318 degrees C and 735torr, are formed when 33.6mL of NH3 at 825torr and 127 degrees C react with oxygen according to the following equation. 4 NH3 + 2 O2 ---> 2 N2 + 6 H2O
A metal whose threshold frequency is 8.22×1014 s^-1 emits an electron with a velocity of 6.59×105 m/s when radiation
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