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In nature, the element X consists of two naturally occurring isotopes. 107X with abundance 54.34% and isotopic mass 106.9051 amu and 109X with isotopic mass 108.9048 amu. Use the given information to calculate the atomic mass of the element X to an accuracy of .001%
Ethyl alcohol is produced by the fermentation of glucose, C6H12O6. Given that the enthalpy of formation is -277.7 kJ/mol for C2H5OH(l) and -393.5 kJ/mol for CO2(g)
A flat 103-turn current-carrying loop is immersed in a uniform magnetic field. The area of the loop is 5.47 cm2 and the angle between its magnetic dipole moment
Explain how it is that the concentrations of chloride ions in these beakers are different even though the concentrations of each substance(compound) are the same.
A hydrogen molecule in it's ground vibrational state with KE=10eV collides with heavy atom metal surface and no energy is transferred to the surface, i.e., the surface can be modeled as an infinite potential wall.
What is the molarity of the prepared naoh solution as determined in the titration? How many moles of OH are present when the end point is reached? What color should the solution appear at end point?
Calculate the mass in grams for pure silver sample that loses 3.10 when its temperature drops from 138 to 20.
If p-nitroacetanilide is hydrolysed in acidic solution, why does hydrolysis not take place during the nitration with HNO3 and H2SO4.
Calculate the molar gibbs energy of fusion (melting) for water at -3degree and 1bar, given that Cp(s)=38J/kmol Cp(l)=75.3j/kmol
the consentration of the reactant to drop to 25% of its inital value. what is the rate constant for reaction?
A 100.0-mL sample of 0.10 M NH3 is titrated with 0.10 M HNO3. What is the pH of the solution after 100.00 mL of acid have been added to the ammonia solution?Kb = 1.8 × 10-5.
Trace amounts of rare elements are found within groundwater and are of interest to geochemists. Europium and terbium are lanthanide-series elements that can be measured from the intensity of their fluorescence emitted when a solution is illuminate..
What is the pressure in a 10.0 L cylinder filled with 0.470 mol of nitrogen gas at a temperature of 329 K ?
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