Вычислите массовые доли всех элементов в следующих вещества: cl7,h2s,c3n4,k2cr2o7, n h4no3.
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Ответы на вопрос:
W(э)=ar(э)/mr*100% csi ar(cs)=133g/mol ar(i) = 127g/mol mr(csi)=260g/mol w(cs)= 133/260*100=51.2% w(i)=127/260*100=48.8% h2s ar(h)=1g/mol ar(s)=32g/mol mr(h2s)=34g/mol w(h)=2*1/34*100=6%g/mol w(s)=32/34*100=94% c3n4 ar(c)=12g/mol ar(n)=14g/mol mr(c3n4)=92g/mol w(c) = 3*12/92*100=39% w(n)=4*14/92*100=61% k2cr2o7 ar(k)=39g/mol ar(cr)=52g/mol ar(o)=16g/mol mr(k2cr2o7)=294g/mol w(k)=2*39/294*100=26.5% w(cr)=2*52/294*100=35.4% w(o) =7*16/294*100=38.1% nh4no3 ar(n)=14g/mol ar(h)=1g/mol ar(o)=16g/mol mr(nh4no3)=80g/mol w(n)=2*14/80*100=35% w(h)=4*1/80*100=5% w(o)=3*16/80*100=60%
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