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%
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%