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The number of N atoms is 681 g of C7H5N3O6 is x x 10^21. The value of x is ______(N_A = 6.02 x 10^23 mol^-1)

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The number of N atoms is 681 g of C7H5N3O6 is x \(\times\) 1021. The value of x is ______(NA = 6.02 x 1023 mol-1)(Nearest Integer)

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M.M. of C7H5N3O6 is 84 + 5 + 42 + 96 = 227

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