Ответы на вопрос:
M(ca(h2po4)2 = 40 + 1*4 + 31*2 + 16*8 = 234 w(ca) = ar(ca) * n / mr(ca(h2po4)2) *100% = 40 *1 / 234 *100% =17% w(h) = ar(h) *n / mr(ca(h2po4)2 *100% = 1 * 4 / 234 *100% = 1,7% w(p) = ar(p) * n / mr(ca(h2po4)2 *100% = 31 *2 / 234 *100% = 26,5% w(o) = ar(o) *n / mr(ca(h2po4)2 *100% = 16 * 8 / 234 *100% = 55%
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