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The standard heat of formation \Delta H^\circ _{\rm f} is defined as the enthalpy change for the formation of one mole of substance from its constituent elements in their standard states. Thus, elements in their standard
Assuming that the gas is at standard temperature and pressure there is 1.00 mole per 22.4 L of volume how many argon atoms are there present in this sign
How do i figure out a mixture of 0.156 moles of C is reacted with 0.117 moles of O2 in a sealed,10.0L vessel at 500 K, producing a mixture of CO AND CO2. the total pressure is 0.640 atm. What is the partial pressure of CO
How many mL of .200 M FeCl3 are needed to react with an excess of Na2S to produce 2.75 g of Fe2S3 if the percent yield for the reaction is 65%? 3Na2S + 2FeCl3 = Fe2S3 + 6NaCl
If 1.87 g of acetic acid(CH3CO2H) reacts with 2.31g of isopentyl alcohol(C5H12O) to give 2.96 gm of isopentyl acetate(C7H14O2)
Which protein elutes first from a carboxymethyl cellulose ion exchange column with an increasing pH gradient
A gaseous system undergoes a change in temperature and volume. What is the entropy change for a particle in this system if the final number of microstates is 0.617 times that of the initial number of microstates?
compound x has the formula c8h14.x reacts with one molar equivalent of hydrogen in the presence of a palladium catalyst
Starting with needed alkanes, alkenes and inorganic regrets, devise syntheses for the following compounds. Yout method should produce each compound in good yield and free of isomers.
175g pure H2O was placed in a constant-pressure calorimeter and chilled to 10C 9.8g pure H2SO4 (also 10C) was added, stirred and the temperature rose to 19.8C.
CCl4 dipole-dipole dispersion ion-dipole ion-ion (b) CsBr dipole-dipole dispersion ion-dipole ion-ion (c) BaCl2 dipole-dipole dispersion ion-dipole ion-ion
The complex ion [CoBr6]3- is a high-spin complex and absorbs light at a wavelength greater than 7.70×102nm . How many unpaired electrons will be present in the complex
a certain first-order reaction has a rate constant of 8.80times10-3. how long will it take for the reactant
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