Sep 5, 2012 #1 T time_search Junior Member level 3 Joined Feb 22, 2010 Messages 25 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Location jordan Activity points 1,454 Hi all, I have critical question i need to know. 1- for ( CF4) the angle is less than 109.5, then why it is in the 4-pyramid equals to 109.5 2- how "Avogadro constant" was calculated? 3- could any one advise for scientific links in chemistry and science that i could read and post questions rather than edaboard which i like most. thanks alot
Hi all, I have critical question i need to know. 1- for ( CF4) the angle is less than 109.5, then why it is in the 4-pyramid equals to 109.5 2- how "Avogadro constant" was calculated? 3- could any one advise for scientific links in chemistry and science that i could read and post questions rather than edaboard which i like most. thanks alot
Sep 6, 2013 #2 M Mohammed_Verification Full Member level 2 Joined Sep 3, 2013 Messages 122 Helped 12 Reputation 24 Reaction score 12 Trophy points 18 Location India Activity points 602 time_search said: Hi all, I have critical question i need to know. 1- for ( CF4) the angle is less than 109.5, then why it is in the 4-pyramid equals to 109.5 2- how "Avogadro constant" was calculated? 3- could any one advise for scientific links in chemistry and science that i could read and post questions rather than edaboard which i like most. thanks alot Click to expand... Hi time_search, refer this link **broken link removed** to calculate the Avogadro constant. Hope It May Be Helpful...
time_search said: Hi all, I have critical question i need to know. 1- for ( CF4) the angle is less than 109.5, then why it is in the 4-pyramid equals to 109.5 2- how "Avogadro constant" was calculated? 3- could any one advise for scientific links in chemistry and science that i could read and post questions rather than edaboard which i like most. thanks alot Click to expand... Hi time_search, refer this link **broken link removed** to calculate the Avogadro constant. Hope It May Be Helpful...