M(NaCrO2) = 23 + 52 + 2*16 = 107
w(Na) = M(Na)/M(NaCrO2) = 23/107 = 0,215 или 21,5%
w(Cr) = M(Cr)/M(NaCrO2) = 52/107 = 0,486 или 48,6%
w(O) = (2*M(O))/M(NaCrO2) = (2*16)/107 = 0,299 или 29,9%
Проверка: 21,5% + 48,6% + 29,9% = 100%
Ответ:
Объяснение:
Mr(NaCrO2) = 23+52+16*2 =107
W(Na) = Ar(Na) *n / Mr(NaCrO2) *100% = 23*1 / 107 *100% =21%
W(Cr) = Ar(Cr) *n / Mr(NaCrO2) *100% = 52 *1 / 107 *100% =49%
W(O) = Ar(O) *n / Mr(NaCrO2) *100% = 16*2 / 107 *100% = 30%
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Answers & Comments
M(NaCrO2) = 23 + 52 + 2*16 = 107
w(Na) = M(Na)/M(NaCrO2) = 23/107 = 0,215 или 21,5%
w(Cr) = M(Cr)/M(NaCrO2) = 52/107 = 0,486 или 48,6%
w(O) = (2*M(O))/M(NaCrO2) = (2*16)/107 = 0,299 или 29,9%
Проверка: 21,5% + 48,6% + 29,9% = 100%
Ответ:
Объяснение:
Mr(NaCrO2) = 23+52+16*2 =107
W(Na) = Ar(Na) *n / Mr(NaCrO2) *100% = 23*1 / 107 *100% =21%
W(Cr) = Ar(Cr) *n / Mr(NaCrO2) *100% = 52 *1 / 107 *100% =49%
W(O) = Ar(O) *n / Mr(NaCrO2) *100% = 16*2 / 107 *100% = 30%