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the mass of 2.50 mol of a compound with the formula ECl4, in which E is a nonmetallic element, is 385g. what is the molar mass of Ecl4? what is the identity of E?

  • chemistry - ,

    sorry, sent it twicee

  • chemistry - ,

    molecular weight of Cl =35.4g

    2.50 mol=385g of ECl4

    This means that
    1 mole of ECl4= (1/2.50)*385g= molecular weight of 1 mole of ECl4

    molecular weight of 1 mole of ECl4-4(35.4g)= molar mass of E.

    look up the identity in the periodic table.

  • chemistry - ,

    thankks again!!1

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