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\left. \begin{array} { l l } { 6.05 \times 10 ^ { 23 } } & { ( 2 ) 3.02 \times 10 ^ { 23 } } \\ { 12.10 \times 10 ^ { 23 } } & { ( 4 ) 9.6 \times 10 ^ { 24 } } \end{array} \right.

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