Mr ( H 2 O ) = 18 Mr ( H2 ) = 2 Mr ( O ) = 16 w ( H ) = 2 / 18 = 0,11 = 11% w ( O ) = 16 / 18 = 0,89 = 89 %
Mr ( H 2 O ) = 18
Mr ( H2 ) = 2
Mr ( O ) = 16
w ( H ) = 2 / 18 = 0,11 = 11%
w ( O ) = 16 / 18 = 0,89 = 89 %