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Assignment
1. A 0.90 % C hypereutectoid plain-carbon steel is slowly cooled form 900oC to a temperature just slightly above 723oC. Calculate the weight percent proeutectoid cementite and austenite present in the steel.
2. What is the normalizing heat treatment for steel? What are some of its purposes?
3. Describe the tempering process for a plain-carbon steel.
4. What are the advantages of the austempering process? What are the disadvantages?
5. What are some of the limitations of plain-carbon steels for engineering designs?
6. What are the principal alloying elements added to plain-carbon steels to make low-alloy steels?
A lab bench has 3 one L stoppered flasks. Flask A contains one mole of NH3 gas. Flask B contains one mole of N2 gas & Flask C contains one mole of SO2 gas. All are at the same temperature.
Brief description of the goal in experiment - Include the reaction with proper physical states
one gram of solid calcium sulfate caso4s is added to 500 ml of pure water. immediately the solid begins to dissolve
When heated, all metallic hypochlorites decompose and produce oxygen. Considering this, what happens when the decomposition reaction occurs at an incident involving fire? Please reference your answer and tell me why.
Calculate the standard free-energy change for the following reaction at 25 degrees C. 2Au^3+(aq) + 3 Cr(s) 2Au(s) + 3Cr^2+(aq)
The gaseous product of a reaction is collected in a 25.0 L contained at 27 degrees Celsius. The pressure in the container is 216 kPa, and the gas has a mass of 96.0g. What is the molar mass of the gas?
A reaction mixture initially contains 4.2 mol ZnS. a. How many moles of oxygen will be required to react with ZnS b. Assuming there is enough oxygen,
Explain what is the pH of a buffer solution that is 0.34 M in Na2HPO4 and 0.46 M in KH2PO4? Ka1 = 7.1E-3, Ka2 = 6.3E-8, and Ka3 = 4.5E-13.
The time required for development at a particular temperature is inversely proportional to the rate constant for the process. Below are published data on development times for Kodak's Tri-X film using Kodak D-76 developer. From these data, estimat..
An unknown gas sample with a mass of 3.17 g and a volume of 0.7521 L at 293.0 K under 1.023 atm has CH2Cl for its empirical formula. What are its molar mass and its molecular formula?
(b) By preheating sensibly and then passing through a water spray washer with recirculated water until relative humidity rises to 95% and then again heating sensibly to the final required state. Determine for (a) and (b) the total heating required..
question in the dumas method for determining nitrogen content in organic compounds a sample is treated with cuo at high
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