m(Na2S2O3)-157г
n(Na2S2O3)-?
N(Na2S2O3)-?
N(S)-?
N(O)-?

Предыдущий
вопрос Следующий
вопрос

n = 1 mol = 158 g/mol
N = 6.02 x 10^23 molecules/mol
N(S) = 2 atoms/molecule = 2N
N(O) = 3 atoms/molecule = 3N

m(Na2S2O3) = 157g
n(Na2S2O3) = m/M = 157g / 158 g/mol = 0.993 mol
N(Na2S2O3) = n N = 0.993 mol 6.02 x 10^23 molecules/mol = 5.98986 x 10^23 molecules
N(S) = 2N = 2 5.98986 x 10^23 = 1.197972 x 10^24 atoms
N(O) = 3N = 3 5.98986 x 10^23 = 1.796958 x 10^24 atoms