75%, 25%.
Объяснение:
M(CH4)=12+4×1=16 (г/моль);
W(C)=12÷16×100%=75%;
W(H)=4÷16×100%=25%.
Mr(CH4) = 12 + 1*4 = 16
W(C) = Ar(C) *n / Mr(CH4) *100% = 12*1 / 16 *100% = 75%
W(H) = Ar(H) *n / Mr(CH4) *100% = 1*4 / 16 *100% = 25%
75%, 25%.
Объяснение:
M(CH4)=12+4×1=16 (г/моль);
W(C)=12÷16×100%=75%;
W(H)=4÷16×100%=25%.
Объяснение:
Mr(CH4) = 12 + 1*4 = 16
W(C) = Ar(C) *n / Mr(CH4) *100% = 12*1 / 16 *100% = 75%
W(H) = Ar(H) *n / Mr(CH4) *100% = 1*4 / 16 *100% = 25%