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9 January, 11:12

A compound is found to contain 7.962 % silicon, 20.10 % chlorine, and 71.94 % iodine by mass. to answer the question, enter the elements in the order presented above. question 1: the empirical formula for this compound is

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  1. 9 January, 14:24
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    Empirical formula is calculated as follows

    calculate the moles of each element, that is % composition / molar mass

    molar masses (Si = 28.09g/mol, Cl = 35.5 g/mol, I=126.9 g/mol)

    moles of silicon = 7.962/28.09g/mol = 0.283 moles

    moles of chlorine = 20.10 / 35.5g/mol = 0.566 moles

    moles of iodine = 71.94 / 126.9 g/mol = 0.567 moles

    divide each mole with smallest mole (0.283)

    that is silicon = 0.283/0.283 = 1 mole

    chlorine = 0.566/0.283 = 2 mole

    Iodine = o. 567/0.283 = 2 moles

    empirical formula is therefore = SiCl2I2
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