我想知以下chemical既化學式..

1. sodium hydroxide solution
1. NaOH (aq)

2. calcium carbonate
2.CaCO3 (s)

3. calcium oxide
3.CaO (s)

4. calcium hydroxide
4.Ca(OH)2 (aq)

5. dilute hydrochloric acid
5.HCl(dil)

6. calcium chloride
6.Ca(Cl)2(s)

7. carbonic acid
7.H2CO3 (aq)

I'm sure that they all are right, you can use them !

2007-03-27 19:42:59 補充：
please do not miss the this sign "( )"

2007-03-27 19:43:15 補充：
if you write CaOH2 that mean there are only one oxygen atom and two hydrogen atomunlike the standard answer two oxygen atom and two hydrogen atom so please be careful =)

1. sodium hydroxide solution NaOH(aq)
2. calcium carbonate CaCO3
3. calcium oxide CaO
4. calcium hydroxide Ca(OH)2
5. dilute hydrochloric acid HCl(aq)
6. calcium chloride CaCl2
7. carbonic acid H2CO3