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Find the formula mass ofCu(NO3)2...

Find the formula mass of`Cu(NO_3)_2`

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Formula mass of` Cu(NO_3)_2` = average atomic mass of Cu + 2 x (average atomic mass of nitrogen + average atomic mass of three oxygen) = (63.5) + 2(14 + 3 x 16) = 187.5 u
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