What is the molecular formula for a compound with the empirical formula cacl2 and a molar mass of 330g quizzez?

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24-02-2018
Chemistry

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What is the molecular formula for a compound with the empirical formula cacl2 and a molar mass of 330g quizzez?

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superman1987 superman1987 · Answer 1 · 2018-03-05T19:36:58+01:00

superman1987 superman1987

05-03-2018

The empirical formula is CaCl2, which means Ca= x & Cl= 2x & where the molecular weight is 330 g
So x(Ca) + 2x(Cl) = 330 and when the molecular weight of Ca=40 & the molecular weight of Cl = 35
∴ x(40) + 2x (35) =330
40 x + 70 x = 330
110 x = 330
x= 330/110 = 3
∴ the molecular formula is Ca3Cl6

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