Mr(CH4) = Ar(C) + 4*Ar(H) = 12 + 4*1 = 16
w(H) = (4*Ar(H)/Mr(CH4))*100% = (4*1/16)*100% = 25%
Ответ: w(H) = 25%
Mr(CH4) = Ar(C) + 4*Ar(H) = 12 + 4*1 = 16
w(H) = (4*Ar(H)/Mr(CH4))*100% = (4*1/16)*100% = 25%
Ответ: w(H) = 25%