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Empirical Formula of a Compound and ConversionThe characteristic odor of pineapple is due to ethyl butyrate, a compound containing carbon, hydrogen, and oxygen. Combustion of 2.78 mg of ethyl butyrate produces 6.32 mg of CO2, and 2.58 mg of H2O. What is the empirical formula of the compound?
Consider the following thermochemical equation: CH4(g) + I2(g) --> CH3I(g) + HI(g) Enthalpy Value = +23 kJ
If 5.50 mol calcium carbide reacts with an excess of water, how many moles of acetylene will be produced.
Determine the product of the reaction. As a general rule, a metal will combine with a nonmetal to form an ionic compound.
Molecular iodine, I2 (g), dissociates into iodine atoms at 625 K with a first-order rate constant of 0.271 s-1. If you start with 5.2x10^-2 M I2 at this temp.
The half-life for the second order reaction of a substance A is 55 seconds when [A]o is 0.84 M. What time is needed for the concentration to decrease to 1/4 of the original value.
A mixture of MgCO3 and MgCO3·3H2O has a mass of 3.057 g. After heating to drive off all the water the mass is 2.790 g. What is the mass percent of MgCO3·3H2O in the mixture.
CaC2 + 2H2O --> C2H2 + Ca(OH)2. Using this equation, determine how many moles of CaC2 are needed to react completely with 49 g H2O.
Determine the entropy change for freezing 6.33 grams of C 2 H 5 OH at 158.7 K? H =-4600 J/mol. Express your answer in units of J/K.
Two students measure the density of gold. One works with a 100-g bar of pure gold. The other works with a 200-g bar of pure gold. Which student measures the larger density.
Explain the structural feature of Acetanilide molecule - Identify one structural feature of the acetanilide molecule
0.10 mol of argon gas is admitted to an evacuated 50cm^3 container at 20C. The gas then undergoes an isobaric heating to a temperature of 300C.
Using a sample of 0.0355 gram of an unknown molecular compound is dissolved in 1.000 g of liquid camphor at 200.0°C. Calculate the molar mass of the unknown compound if the camphor freezes at 157.7°C upon cooling.
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