Qualification > Sciences
IGCSE CHEMISTRY DOUBTS HERE !!!!
Most UniQue™:
--- Quote from: Amelia on June 08, 2011, 12:00:02 pm ---Just the four bonds, yes. They are asking you to show only a 'part' of the diamond shape, that's all. ;)
--- End quote ---
WHat i mean is that should they be in the same positions or they can be random positions?
Amelia:
--- Quote from: Most UniQue™ on June 08, 2011, 12:56:03 pm ---WHat i mean is that should they be in the same positions or they can be random positions?
--- End quote ---
Oh that! Yeah, you can draw any way you want.
Most UniQue™:
--- Quote from: Amelia on June 08, 2011, 01:19:09 pm ---Oh that! Yeah, you can draw any way you want.
--- End quote ---
Oh ok tnxxx a lot!!
Assi1993:
heelloo frieds can anyone pleasseeeeee solve this question today?? its urgent..
8. A gaseous organic compound, X, was burnt in an excess of oxygen. A 0.112 dm sample of X, measured at s.t.p., produced 0.88 g of carbon dioxide.
How many carbon atoms are there in one molecule of X?
waiting
thankuuuu SF
~ Miss Relina ~:
--- Quote from: Assi1993 on December 31, 2011, 01:12:51 pm ---heelloo frieds can anyone pleasseeeeee solve this question today?? its urgent..
8. A gaseous organic compound, X, was burnt in an excess of oxygen. A 0.112 dm sample of X, measured at s.t.p., produced 0.88 g of carbon dioxide.
How many carbon atoms are there in one molecule of X?
waiting
thankuuuu SF
--- End quote ---
I am not pretty sure but I'll try
0.88/44 = gives the no.of mole of CO2= 0.02
0.02 x 12 = give no.ofmoles of carbon atoms present= 0.24
multipy 0.24 by avogaro's constant 6.023*1023=1.45*1023
I Hope I helped :)
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