re:mineral,ore,rock,metal

From: edwin (edwin2b_at_yahoo.com-dot-hk.no-spam.invalid)
Date: 12/28/04 

Date: 28 Dec 2004 12:30:07 -0600

> Are the following your homework questions?

You are nice,ha~Actually,no :)

Sorry, Excuse me.I want to ask a few questions.

1)Oxygen can supply burning whereas nitrogen does not.
   Is it a physical property or
[u:973d8351ed]chemical property [/u:973d8351ed]for oxygen??

2)
    [quote:973d8351ed]b) calcium
oxide+water--->calcium
hydroxide

 
d)calciumcarbonate+carbondioxide+water------->[color=red:973d8351ed]calciumhydrogencarbonate[/color:973d8351ed]
[/quote:973d8351ed]

In this case, Are calcium hydroxide and
calciumhydrogencarbonate solid form or liquid form??

What about them [b:973d8351ed]in reality[/b:973d8351ed]??

3)What is the difference between EVAPORATION and CRYSTALLIZATION??
   Is that we use fire to carry out evaporation when we don't use fire
to carry out crystallization correct??

4)Last question, what is the difference between fire and flame??
  and why the air hole of Bunsen burner opened give us a hotter
,irregular and non-luminous blue flame??

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