Really need help on this!

Calculations to determine the mole of any units? Can you please rephrase this? The only thing that I think you are after is this:

moles = (mass of substance)/(relative molecular mass of the substance)

One mole is 6.02 x10^23 atoms of the substance (this number is called Avogadro's number)

To work out the number of moles of a substance in a volume of solution of known concentration:
moles = concentration of the solution (measured in moles per litre (moldm^-3)) x volume of solution (measured in litres - 1cm^3 = 0.001 dm^3).

I hope this provides you with the basics for moles calculations. Once you know some basic chemistry a good site to learn from is http://www.chemguide.co.uk/ , although you need some background knowledge of the subject to make it useable.

For this "background information" I suggest the use of this link - http://www.s-cool.co.uk/topic_index.asp?subject_id=21 ; It covers the basics that you will need before you can further your knowledge

[Edited on 29-6-2008 by DJF90]

Without defining the exact assumptions your wacko is trying to defend (re. 9/11) it'll be very difficult to actually come up with something that is a decent rebuttal of his position.

One (and only one) of the reasons why the conspiracy theorists feel comfortable with the 'controlled demolitions by thermite charges' theorette is that iron oxide based thermites do indeed have the potential to melt steel in a jiffy but that doesn't mean anything at all. In essence the issue becomes a complex engineering problem where a multitude of factors have to be taken into account, including the end-temperature reached by the reacting thermite mixture, heat losses during the burn and mass and thickness of any steel object one would like to weaken/damage/destroy/burn right through (etc etc), load of the bearing steel, to name but a few.

On the end-temperature reached by a burning thermite mixture alone, one can pontificate rather lengthily, as this factor in itself depends largely on several factors such as granulometry of ingredients and whether or not the generated heat is being contained as much as possible or allowed to leak away.

For ferric oxide (Fe₂O₃, the amount of heat generated (@ 298 K) is a rocking 851.50 kJ per mol of reacted oxide (to put this into perspective, it's enough heat to raise the temperature of 2 kg of iced water to its boiling point). From the heat capacities and heats of fusion of the reaction products (Fe and alumina) the end-temperature in adiabatic (no heat exchange with the surrounding environment) conditions can be worked out using the method described in this post.

There is little doubt that various thermite mixtures (and not just ferric thermite) can easily (but still depending on conditions) reach the melting point of the highest melting steels and backyard enthusiasts (like me) routinely reach such temperatures with homebrewed mixes.

If the hot thermite mass charge is large enough vis a vis the target object's mass it would be possible to destroy almost anything with melting points up to 2,500 to 3,000 C (4,500 F to 5,400 F). So it's impossible to win the argument on thermochemical grounds: cleverly engineered thermite charges could indeed destroy just about any load bearing metal structure.

But the idea that Government agents put in place such charges, prior or during the attacks to cause the destruction of the towers, strikes me as preposterous. And the onus to prove that they did lays with the conspiracy nutjobs...

I hope my comment doesn't set off a frenzy of conspiracy discussions here: there are plenty wacky forums whose only raison d'être is just that.

[Edited on 30-6-2008 by blogfast25]

Wikipedia... that's a joke right

Quote:

Originally posted by DJF90moles = (mass of substance)/(relative molecular mass of the substance) I hope this provides you with the basics for moles calculations. Once you know some basic chemistry a good site to learn from is http://www.chemguide.co.uk/ , although you need some background knowledge of the subject to make it useable. For this "background information" I suggest the use of this link - http://www.s-cool.co.uk/topic_index.asp?subject_id=21 ; It covers the basics that you will need before you can further your knowledge [Edited on 29-6-2008 by DJF90]

Quote:

Originally posted by blogfast25For ferric oxide (Fe<sub>2</sub>O<sub>3</sub>, the amount of heat generated (@ 298 K) is a rocking 851.50 kJ per mol of reacted oxide

I understand, but you got to get a foot somewhere