Ответы и объяснения

2012-11-18T00:42:34+04:00

Mr ( H 2 O ) = 18 
Mr ( H2 ) = 2 
Mr ( O2 ) = 16 
w ( H ) = 2 / 18 = 0,11 = 11% 
w ( O2 ) = 16 / 18 = 0,89 = 89 %

 

Mr (SI O 2) = 60

Mr (Si) = 28

Mr (O2 ) = 16

W ( Si ) = 28/60=46,6%

W ( O2 )=32/60=53.3%