Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
Raywin:
--- Quote from: Dana on June 06, 2010, 04:54:18 pm ---thats when the equation involves only gases. then you can use mole volume ratio or whatever is called :P
--- End quote ---
Only gases huh? Lol, ryte, so in that case we can guess how much of something is formed (the volume) using the mole ratios? Thx.. :)
MasterMath:
--- Quote from: Raywin on June 06, 2010, 04:52:42 pm ---Guys, this has been bugging me. In some papers, the mole concept Q, sometimes the easy way to solve the problems is to use something like the volume ratio is same as the mole ratio or something. Umm, what is this and when can we use this? Thanks a lot in advance. :)
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take this reaction for example:
2N2 + 3H2 -----> 2NH3
56g 6g 34g
Now you can use this for example if they tell you we gave you 5.6g of nitrogen.. how many grams will be produced of hydrogen
Then you can do this
56 6
5.6 x
then find X by .. (5.6*6)/56
The same can be done
If you change it
The mole ratio is simply the co-officent of the reactants and products
2 3 2
just follow the same if they give you a specific amount of moles of reactant/product!
NidZ- Hero:
why does acid and salt water speed up de rate of rusting
can sum1 plz answer this
ASAP
The Hitman:
Yo, I needed to ask, why does water act as a base when Sulphuric Acid dissolves in it?
Raywin:
--- Quote from: MasterMath on June 06, 2010, 04:53:30 pm ---Hmm .. look at this
K
Na
Li
Ca
Mg
Al
C
Zn
Fe
Pb
H
Cu
Ag
Okay thats the reactivity series .. as you go down reactivity decreases .. ANY METAL ABOVE Ca .. reacts with COLD water to form hydroxide and H2
Anything under it forms oxide and H2 :D
Hope i helped
--- End quote ---
Umm, i remember seeing MgOH.. O.O :S
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