abdullahAK
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#1
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#1
I have a question related to chemistry.
stoichiometry
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username3249896
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#2
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Stoichiometry is the calculation of reactants and products in chemical reactions.
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abdullahAK
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#3
this is the question
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username3249896
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(Original post by abdullahAK)
this is the question
C4H8 + 6O2 -> 4CO2 + 4H2O

1 volume of C4H8 gives 4 volumes of CO2
44 L of C4H8 gives 176L of CO2

number of moles of CO2 =176/22 = 8 mol

mass = 8 x 44 = 352g.

so B.
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abdullahAK
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But H20 isn't given in the question.
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username3249896
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(Original post by abdullahAK)
But H20 isn't given in the question.
Learn about combustion.
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abdullahAK
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#7
can you recommend any website for leaning combustion.
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username3249896
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(Original post by abdullahAK)
can you recommend any website for leaning combustion.
https://en.wikipedia.org/wiki/Combustion
Scroll down to chemical reactions
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abdullahAK
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thanks a lot.
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abdullahAK
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#10
Hello to everyone.
Hope everyone is doing well.
Can anyone explain why the answer is D rather than A.
thanks.
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username3249896
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(Original post by abdullahAK)
Hello to everyone.
Hope everyone is doing well.
Can anyone explain why the answer is D rather than A.
thanks.
Silicon dioxide has a giant molecular structure. It has high melting point, does not conduct electricity when molten or solid (no delocalised electrons). So answer is D.

It cannot be A because the melting point is low. A is a compound with simple molecular structure.
Last edited by username3249896; 2 years ago
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abdullahAK
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#12
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#12
Understood.
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