Last Minute 'O' Level Chemistry Calculations Question!
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A sample of nitrogen gas contains the same number of atoms as found in 4.0g of methane gas. What is the mass of the sample of nitrogen gas?
I'll reveal the answer at 11.15pm if no one gets it correct by then.
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i sure fail tml's chem paper. from sec3 till now nvr pay attention. now sec5 liao. siao already.
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Originally posted by UltimaOnline:
A sample of nitrogen gas contains the same number of atoms as found in 4.0g of methane gas. What is the mass of the sample of nitrogen gas?
I'll reveal the answer at 11.15pm if no one gets it correct by then.
14.9g ?
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Originally posted by SBS315T:
14.9g ?
Nope.
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n=m/mr
m=n X mr
find the no of mol of n2 gas then X the mr
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how u find methane gas ar
by the way not sure is it correct cause i studying combine chem
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7.0 g
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Originally posted by deteq:
7.0 g
Nope. -
Originally posted by Ah sian:
how u find methane gas ar
by the way not sure is it correct cause i studying combine chem
Methane is 1 C bonded to 4 H. It's in combined Science. -
3.5
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Originally posted by deteq:
3.5
Nope. -
wats e ans?
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3.5 ar
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dun revel first
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I'll extend the challenge to 11.30pm. Ho Ho Ho!
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1.4
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Originally posted by Ah sian:
3.5 ar
Nope. -
Originally posted by deteq:
1.4
Nope. -
35
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17.5g (Mistook methane as CH3)
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Originally posted by deteq:
35
Nope. -
1.96
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Originally posted by SBS315T:
17.5g (Mistook methane as CH3)
Well done!
Solution :
(2)(x/28) = (4/16)(5)
x = 17.5g
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what does (2)(x/28) mean
i onlyu know use 4g /16 mr but why u X 5
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Originally posted by Ah sian:
what does (2)(x/28) mean
i onlyu know use 4g /16 mr but why u X 5
Methane is CH4 and hence has 5 atoms.