Molybdenum

AhJA asked:


Can someone give me the best answer!!!!Give me a catching topic

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jz asked:


Hi, I got several pure molybdenum and tungsten rods from a garage sale. They are 0.1875″-0.25″ in diameter. Are there any kinds of projects that I can work with them? Thanks!

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Angelika asked:


how many disintegrations have occured after 15 minutes?

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Subconscious point of view asked:


i see in my manual for a crf250 that i can use this oil on the engine side but not the tranny. i see on the internet its molybdenum sulphide which supposedly reducing friction on moving parts. i take it the concern is with slipping gears in the tranny then. and would this be a good choice for my engine oil

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Pooton asked:


like noble gases, halogen, etc?

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trish asked:


For 1.3 mole of the radioactive isotope molybdenum-99, half-life = 67 hours, how many disintegrations have occurred after 20 minutes?

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lets_tally asked:


I am an investor in Amerigo Resources, a company that has a plant in Chile to extract more copper and also molybdenum from old and fresh mine tailings (from Coldeco’s El Teniente mine). They have a consultant studying laundering the waste product by a pipeline from the extraction (which involves crushing) process back into a swampy area (the Colihues) where the old tailings are stored. Apparently, the redeposited material would have the quartz removed and be more granular (crushed).

Is there a net environmental problem or benefit from this kind of recycling from and back into the Colihues tailings dam? What are the consequences of replacing the old (and some new) tailings in the Colihues with the original tailings pulled out of there with the processed tailings in more granular form after pulling out more copper and also moly?

The Chilean government is very vigilant these days about anything from mining that might pollute the environment.
I’m not sure if the main mining company, Coldeco, is using the leach-solvent extraction-electrowinning process or, SX/EW Process for their primary extraction. Amerigo Resources does a second pass on old mine tailings, which were perhaps created in the Colihues tailings dam over 20 years ago. I know that they grind those old tailings in a low-tech kind of operation.

They want to pull the old tailings out of the Colihues tailings dam, process them to extract further copper (and molybdenum), and then put what is left from their operation back into the same Colihues tailings dam. But, Coldeco (owned by the Chilean government) won’t allow this kind of recycling yet, until they are sure that a pollution problem is not created.

Do you know why laundering the waste product from Amerigo’s operations would result in pollution, meaning, I think, pollution of the Colihues tailings dam, to which most of the materials would be returned after processing?

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curiositykilledthecat asked:


A 237 g piece of molybdenum, initially at 100.0°C, is dropped into 244 g of water at 10.0°C. When the system comes to thermal equilibrium, the temperature is 15.3°C. What is the specific heat capacity of the metal?

answer should be in J/gK

step by step solution would be greatly appreciated. thanks!

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