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Freon-11 and Freon-12, both refrigerants, were banned in 1996.

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16y ago

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What series contain manmade elements?

technetium (Tc), 43promethium (Pm), 61neptunium (Np), 93plutonium (Pu), 94americium (Am), 95curium (Cm), 96berkelium (Bk), 97californium (Cf), 98einsteinium (Es), 99fermium (Fm), 100mendelevium (Md), 101nobelium (No), 102lawrencium (Lr), 103rutherfordium (Rf), 104dubnium (Db), 105seaborgium (Sg), 106bohrium (Bh), 107hassium (Hs), 108meitnerium (Mt), 109darmstadtium (Ds), 110roentgenium (Rg), 111copernicium (Cn), 112I got this off of a website, it goes in this order: Name, symbol, and atomic mass.


Why the blackboard called a blackboard if the color of the board is green?

Originally they were made of thin sheets of a type of rock known as slate- which is very dark gray (black) in color. Later they used a man manmade material that was lighter and cheaper, and changed the color to green- better visibility. But we still use the old name.


What is the common name for COCl2?

The common name for COCl2 is phosgene. It is a toxic gas that was used as a chemical weapon during World War I.


What is the name that describes the steps you use during an experiment?

The steps used during an experiment are typically called the experimental procedure or method. It outlines the process followed during the experiment to ensure consistency and accuracy in the results.


What is the name of solution taken in the flask during titration?

The solution taken in the flask during titration is called the "analyte" solution. It is the solution being analyzed and measured for its concentration or reacting with a standardized solution.

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