Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
Lariemeeva:
--- Quote from: Lariemeeva on June 06, 2010, 10:21:23 am ---https://studentforums.biz/index.php/topic,54.msg253414.html#msg253414
Here's the link posted by VIN. Sorry my net is really slow right now, I can hardly upload anything.
Here's my question.
Anyone can help me with Chemistry Oct/Nov 2009 P3, Q 5b, c (i) and (ii).
I'm really getting confused, and I'd appreciate an explanation on the whole hydride thing.
--- End quote ---
I still don't get it. Anyone can help?
Ivo:
--- Quote from: Lariemeeva on June 06, 2010, 12:00:41 pm ---I still don't get it. Anyone can help?
--- End quote ---
You don't need to know about hydrides. They tell you in the question: they are comparable to alkanes.
So, you just draw the structual formula of Ge4H10 (alkane would be C4H10).
We know products of combustion of alkanes are carbon dioxide and water, so simply for these hydrides it's germanium (IV) oxide and water.
Helium:
--- Quote from: CatAly$t on June 06, 2010, 11:53:03 am ---how do we know which reagent is in excess??
and how do u solve the fourth question??
--- End quote ---
? Because they say grams we have to assume the Cl2 and S02 are solids not gases
right?
Ivo:
--- Quote from: Helium on June 06, 2010, 12:08:51 pm ---? Because they say grams we have to assume the Cl2 and S02 are solids not gases
right?
--- End quote ---
Yes.
bored2death:
aqueous refers to dilute ... as in it contains a high concentration of water molecules.
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