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9 June, 19:43

A fictitious element X is composed of 10.0 percent of the isotope 55X, 20.0 percent of the isotope 56X, and 70.0 percent of the isotope 57X. Calculate the weighted atomic mass of element X to the nearest tenth.

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  1. 9 June, 23:15
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    The weighted atomic mass of element X = 0.1*55 + 0.2*56 + 0.7*57 = 56.6 g/mol.
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