Sign In
Ask Question
Damian Lane
Chemistry
19 March, 20:39
What is the PEN for flourine?
+5
Answers (
2
)
Kellen Poole
19 March, 20:51
0
In 1670 a recipe containing Bohemian emerald (now known as calcium fluoride, CaF2) was used to etch glass. It seems that George Gore made a little fluorine through an electrolytic process but his apparatus exploded when the fluorine produced reacted with hydrogen from the other electrode. The element finally was isolated in 1886 by Ferdinand Frederic Henri Moisson who used an apparatus constructed from platinum. His reward was the Nobel Prize for chemistry in 1906.
Comment
Complaint
Link
Isabelle Nelson
19 March, 21:07
0
The energies of combustion in fluorine of α-white phosphorus and three modifications of red phosphorus-amorphous I, crystalline IV and crystalline V-were measured. With the adoption of α-white phosphorus as standard state, the standard enthalpy of formation of PF5 (g) at 25° was calculated to be - 380.8±0.3 kcal mole-1. The enthalpies of transition at 25° for the following processes are reported: P (α-white) →P (amorphous red I), ΔHt=-3.9±0.4 kcal g-atom-1; P (α-white) →P (red V), ΔHt=-3.9±1.5 kcal g-atom-1; P (red IV) →P (red V), ΔHt=-1.2±1.0 kcal g-atom-1. High-temperature thermodynamic functions for PF5 (g) are also reported.
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Find an answer to your question 👍
“What is the PEN for flourine? ...”
in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers
You Might be Interested in
You have created a circuit in science class. You are using a 9 volt battery. You have generated what type of current? alternating current direct current
Answers (2)
Calculate the number of grams of citric acid, CHO, needed to make 2500 ml of 0.4 CHO
Answers (1)
The element found naturally in the earth that has the heights atomic number is
Answers (1)
How to balance an unbalanced equation
Answers (1)
What are the physical properties of liquid bleach
Answers (1)
New Questions in Chemistry
How does an atom with too few neutrons relative to protons undergo radioactive decay? * by converting proton to a neutron by converting a neutron to a proton by emitting an alpha particle
Answers (1)
What is the chemical formula for the compound formed between sodium and iodine?
Answers (1)
8. Write a balanced chemical equation showing how you could prepare each of the following salts from an acid-base reaction: KNO3, NaBr, and Cas.
Answers (1)
Is calcium carbonate a compound element or mixture?
Answers (1)
Why do covalent bonds not involve the transfer of electrons
Answers (1)
Home
»
Chemistry
» What is the PEN for flourine?
Sign In
Sign Up
Forgot Password?