Qualification > Sciences
Chemistry paper 1 help
blackberry:
--- Quote from: haris94 on May 24, 2010, 06:18:49 pm ---u hv to know the solubility guide
its given here https://studentforums.biz/index.php/topic,7663.0.html
--- End quote ---
thanks foh your efforts but the solubility guide and the guides in textbuks dont actually talk bout non-metals!!!!they only refer to
metals!!!!plus they dont talk bout oxides either so much!!!i tried lukin foh answers on google but didnt find nythin nd sum solubility tables were kinda biased!!!
oh!! is ther a way of knowing which gases are heavy? ....or do we jus stik to wat's given in textbuk?
Weaam:
--- Quote from: blackberry on May 25, 2010, 08:27:59 am ---
oh!! is ther a way of knowing which gases are heavy? ....or do we jus stik to wat's given in textbuk?
--- End quote ---
You mean the density? ???
Cuz i thought were only meant to know how the density differs from one group and another, and down the group.
blackberry:
--- Quote from: weaam on May 25, 2010, 09:59:12 am ---You mean the density? ???
Cuz i thought were only meant to know how the density differs from one group and another, and down the group.
--- End quote ---
not exactlyy!!!i meant like when you make and then collect the gas thru downward or upward delivery or over water.
eg. chlorine is lighter than oxygen evn though it has a higher proton and mass number!!
so...my question is dat how wud we noe this for oder gases?? or do we just have to stik to the gases mentioned in the textbuk??
Weaam:
--- Quote from: blackberry on May 25, 2010, 10:21:22 am ---not exactlyy!!!i meant like when you make and then collect the gas thru downward or upward delivery or over water.
eg. chlorine is lighter than oxygen evn though it has a higher proton and mass number!!
so...my question is dat how wud we noe this for oder gases?? or do we just have to stik to the gases mentioned in the textbuk??
--- End quote ---
That is density ;)
if the gas is less dense than air, you can use upward delievery to collect it, cuz itll be above air, its lighter=less dense.
But if a gas id more dense than air then you use downward delivery cuz the gas will not float above air itll sink to the bottom of the cylinder.
Same thing for water. ;)
Get it now?
firas93:
hi one question. is bitumen a fuel?
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