What is the heat of fusion per mole of cadmium
A 35.8-g sample of cadmium metal was melted by an electric heater providing 4.66 J/s of heat. If it took 6.92 min from the time the metal began to melt until it was completely melted, what is the heat of fusion per mole of cadmium?
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An FM station broadcasts at 106.9 MHz, calculate the wavelength of the corresponding radio waves? What is the amount of energy packaged in a photon with a wavelength of 310 nanometer and calculate the frequency of electromagnetic radiation with a
The freezing point of t-butanol is 25.50°C and Kf is 9.1°C · kg/mol. Usually t-butanol absorbs water on exposure to air. If the freezing point of a 12.2 g sample of t-butanol is 24.59°C, how many grams of water are present in th
The other contains 8.3 L of helium at 4.1 atm of pressure. If the valve is opened, what is the final pressure of the two tanks combined?
A student reported the follow ing percentages for his unknown mixture: 25%NH4Cl, 30% NaCl, and 50% SiO2. Assuming that the calculations were done correctly, explain the students error?
A certain first-order reaction has a rate constant of 8.80×10-3. How long will it take for the reactant concentration to drop to of its initial value?
How many grams of dry NH4Cl need to be added to 2.10L of a 0.500 M solution of ammonia, , to prepare a buffer solution that has a of 8.84? Kb for ammonia is 1.8*10^-5.
The half-life of a certain radioactive element is 1,250 years. What percent of the atoms remain after 7,500 years?
If 122 mL of a 1.2 M glucose solution is diluted to 550.0 mL, what is the molarity of the diluted solution?
A gas made up of atoms escapes through a pinhole 0.552 times as fast as Ar gas. Write the chemical formula of the gas.
At 25 degrees of NH3 (molar mass 17 grams) effuses at the rate of .50 mole per minute. Under the same conditions, which of the following gas effuses at approximatly one-half that rate?
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Explain why in this reappraisal the new emotion you would have experienced would have been rational by justifying how it was not rooted in any of the 7 Fallacy
What would have been the most appropriate attitude for the Germans to adopt? What would you do next if you were in Mr. Soota's position? Explain why?
Imagine you are the newly elected chairman of your barangay Write a letter to the City mayor requesting for a possible sponsorship in a barangay event.
In your opinion, what is a good CV & Resume? How important is your CV & Resume in getting a job?
Question: Why did I pay $119 dollars for the year and not have access to coursework. I don't want to ask questions if I can see examples.
Even within one culture, subgroups may have diverse perceptions. Compare the diverse perceptions that hunters, vegetarians, even political parties might have
To Find and analyze a recent article in the news that discusses an aspect of the mass media industry and how it's changing/adapting to today's world.