Ответы на вопрос:
1) mr(so2) = ar(s) + 2*ar(o) = 32 + 16*2 = 64 ω(fe) = ar(s) / mr(so2) * 100% = 32 / 64 *100% = 50% ω(o) = 2*ar(o) / mr(so2) * 100% = 32 / 64 *100% = 50% 2) mr(kclo3) = ar(k) + ar(cl) + 3*ar(o) = 39 + 35.5 + 3*16 = 122.5 ω(k) = ar(k) / mr(kclo3) * 100% = 39 / 122.5 * 100% = 31.8% ω(cl) = ar(cl) / mr(kclo3) * 100% = 35.5 / 122.5 * 100% = 29% ω(o) = 3*ar(o) / mr(kclo3) * 100% = 48 / 122.5 * 100% = 392%
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