Mr(H2SO4) = Mr = 2 * 1 + 32 + 4 * 16 = 98
w(H) = 2Ar(H) / Mr = 2 / 98 = 0.0204 = 2.04%
w(S) = Ar(S) / Mr = 32 / 98 = 0.3265 = 32.65%
w(O) = 4Ar(O) / Mr = 0.6531 = 65.31%
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Mr(H2SO4) = Mr = 2 * 1 + 32 + 4 * 16 = 98
w(H) = 2Ar(H) / Mr = 2 / 98 = 0.0204 = 2.04%
w(S) = Ar(S) / Mr = 32 / 98 = 0.3265 = 32.65%
w(O) = 4Ar(O) / Mr = 0.6531 = 65.31%