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Объяснение: you may convert methane to acetylene and than to benzen
H3PO4:
W(H) = Ar(H)*n / Mr(H3PO4) * 100% = 1*3 / 98 * 100% = 3,1%
W(P) = Ar(P)*n / Mr(H3PO4) * 100% = 31*1 / 98 * 100% = 31,6%
W(O) = Ar(O)*n / Mr(H3PO4) * 100% = 16*4 / 98 * 100% = 65,3%
Наверняка, не PO5, а P2O5:
W(P) = Ar(P)*n / Mr(P2O5) * 100% = 31*2 / 142 * 100% = 43,7%
W(O) = Ar(O)*n / Mr(P2O5) * 100% = 16*5 / 142 * 100% = 56,3%
M(CH3COOH)=250*9/100%=22.5 г
m(H2O)+250-22.5=227.5
MnSO4 + 2KNO3 = K2SO4 + Mn(NO3)2
раст. ------ раст. -----раст. ------раст.
Mn + SO4 + 2K + 2NO3 = 2K + SO4 + Mn + 2NO3