Afli mai intai masa moleculara la acid carbonic.Apoi vei scrie: in 62 g acid carbonic......12 g carbon si in 128 g acid carbonic.... x g carbon
si vei afla cantitatea de carbon

Răspunsuri

2014-05-07T16:14:22+03:00
Acidul carbonic:H2CO3
M=2*1+12+16*3=62g (te uiti in tabelul periodic)
Acum calculam cu regula de 3 simpa:
62 gH2CO3.....12 g C
128...................x
x=128*12/62=24.77g C

1 3 1
2014-05-07T17:19:05+03:00
Acidul carbonic:H2CO3
M=2 x 1+12+16 x 3=62g 

 regula de 3 simpa:
62 gH2CO3.....12 g C
128...................x
x=128*12/62=24.77g C