Объяснение:
Mr(H2SO3) = 1*2 + 32 + 16*3 =82
W(H) = Ar(H) *n / Mr(H2SO3) *100% = 1*2 / 82 *100% =2%
W(S) = Ar(S) *n / Mr(H2SO3) *100% = 32*1 / 82 *100% =39%
W(O) = Ar(O) *n / Mr(H2SO3) *100% = 16*3 / 82 *100% =59%
