Search results
Results from the WOW.Com Content Network
This implicitly puts the value of compounds' other constituents, and the cost of extraction of the element, at zero. ... Fluorine: 0.001696: 585 ...
Fluorine is relatively inexpensive, costing about $5–8 per kilogram ($2–4 per pound) when sold as uranium hexafluoride or sulfur hexafluoride. Because of difficulties in storage and handling, the price of fluorine gas is much higher. [27]
[36] [37] [38] Heavier halogens [39] react readily with fluorine as does the noble gas radon; [40] of the other noble gases, only xenon and krypton react, and only under special conditions. [41] Argon does not react with fluorine gas; however, it does form a compound with fluorine, argon fluorohydride.
The researchers also discovered that wristbands that cost more than $30 typically contained more fluorine than those priced under $15. The wristbands were also checked for 20 different types of ...
According to the American Dental Association, the average cost per year for U.S. communities to fluoridate their water supplies ranges from 50 cents per person for large communities to $3 per ...
These compounds were chosen for their solubility, safety, availability, and low cost. [40] A 1992 census found that, for U.S. public water supply systems reporting the type of compound used, 63% of the population received water fluoridated with fluorosilicic acid, 28% with sodium fluorosilicate, and 9% with sodium fluoride.
For premium support please call: 800-290-4726 more ways to reach us
Hydrogen fluoride does not boil until 20 °C in contrast to the heavier hydrogen halides, which boil between −85 °C (−120 °F) and −35 °C (−30 °F). [ 6 ] [ 7 ] [ 8 ] This hydrogen bonding between HF molecules gives rise to high viscosity in the liquid phase and lower than expected pressure in the gas phase.