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Topic: NEED HELPPPPPPPPPPPPPPPPPPP  (Read 2915 times)

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Offline gurminder89

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NEED HELPPPPPPPPPPPPPPPPPPP
« on: March 19, 2007, 11:16:02 PM »
a compound with an empirical formula of SIH4 has a molar mass of 96.g/mole.determine the molecular formula  ??? ??? ??? ??? ??? ??? ???
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Offline Yggdrasil

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Re: NEED HELPPPPPPPPPPPPPPPPPPP
« Reply #1 on: March 19, 2007, 11:44:59 PM »
If the empirical formula is SIH4 then the ratio of S:I:H in the compound is 1:1:4.  So, the compound will have a molecular formula of SnInH4n.  Find the molecular weight of this compound in terms of n and then set it equal to 96g/mol.  Solve for n and then you have your molecular formula.
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Offline madscientist

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Re: NEED HELPPPPPPPPPPPPPPPPPPP
« Reply #2 on: March 20, 2007, 02:35:22 AM »
You sure the empirical formula isn't SiH4? Because the minimum molecular weight for SIH4 (n=1) is 163.002 g/mol.  Im fairly sure it is SiH4, with the ratio being  Si:H = 1:4
« Last Edit: March 20, 2007, 02:52:22 AM by madscientist »
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