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a binary compound contains chromium and iodine and has a mass of 8.301 grams. if the compound contains 12.05% chromum, calculate the ,ass of odine used from the compound and its emperical formula.

Jul 30th, 2015

total mass 8.301

If the compound contains 12.05%  Chromium

That means weight of chromium in the compound = 12.5/100 x 8.301

= 1 gm

So it means the mass of iodine is 8.301gms - 1gm = 7.301gms

2) Determine moles:

Cr ā 1 g / 51.996g/mol = 0.019 mol

Iodine Iā 7.301/126.904 g/mol = 0.0575 mol

Jul 30th, 2015
This is a molar ratio of 1: 3 ratio between Cr and I

EMPIRICAL FORMULA
CRI3

Jul 30th, 2015

Sorry CrI3

Jul 30th, 2015

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Jul 30th, 2015

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