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14 March, 01:52

A certain element x has four isotopes. 5.845% of x has a mass of 53.93961 amu. 91.75% of x has a mass of 55.93494 amu. 2.123% of x has a mass of 56.93539 amu. 0.2820% of x has a mass of 57.93328 amu. what is the average atomic mass of element x?

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  1. 14 March, 02:18
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    53.93961amu x. 05845 = 3.152

    55.93494 amu x. 9175 = 51.320

    56.93539 amu x. 02123 = 1.208

    57.93328 amu x. 002820 =.16633

    add It up.

    amu = 55.83833

    round to significant figures

    amu = 55.84
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