Ответ:

Объяснение:

Mr(H2SO4) = Ar(Н) * 2+ Ar(S) + Ar(O) * 4 = 1 * 2 + 32 + 16 * 4 = 98

w(Н) = Ar(Н) * n/Mr(H2SO4) * 100% = 1 * 2/98 * 100% = 2,04%

w(S) = Ar(S) * n/Mr(H2SO4) * 100% = 32/98 * 100% = 32,65%

w(O) = Ar(O) * n/Mr(H2SO4) * 100% = 16 * 4/98 * 100% = 65,31%