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18 March, 18:54

Calculate the formula mass of calcium iodate, ca (io3) 2, in atomic mass units (amu or u).

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  1. 18 March, 19:12
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    389.88094 amu First we look up the atomic mass of all elements contained in calcium iodate using the periodic table: Ca: 40.078 I: 126.90447 O: 15.999 As an intermediate step we calculate the molecular mass of the ion IO3: 126.90447 + 3*15.999 = 174.90147 Then we calculate the mass of one calcium atom and 2 iodate ions: 2*174.90147 + 40.078 = 389.88094 amu
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