i need to know formula of following i am student of class 6calcium chlorideammonium hydrogen carbon acid?

Question

sodiumbicarbonate
zinc chloride
chlorine
flourine
lead chloride
barium chloride
coper chloride
formic acid
haemoglobine
copperoxide

Answer 1

1.NaHCO3
2.ZnCl2
3.Cl2
4.F2
5.PbCl2
6.BaCl2
7.CuCl2
8.HCOOH
9.Hb4(O8)(oxygenated)
10.(Cu2)O,CuO
Calcium Chloride-CaCl2
Ammonium-(NH4+)
Hydrogen carbon acid-(H2)CO3

Answer 2

These compounds depend on the 'strength' of the first ion: Calcium is a ++ ion, so it takes either 2 - ions or 1 -- ion. Example: CaCl2 or CaSO4. Cl- is a single - ion, so Ca++ needs 2 of them. SO4-- is a double -- ion, so Ca++ only takes one SO4. Your list is an interesting mix - it includes a couple gases (chlorine and fluorine - remember in fluorine the u comes before the o), which you might expect to behave like other gases such as hydrogen, oxygen and nitrogen..
'bicarbonate' is HCO3- (although it might better be written as OCOOH-), and you'll need to get the number of chlorides (and the oxide) from the number of '+'s on each of the metals involved. "Ammonium Hydrogen Carbon Acid" I'm not familiar with - could that be 'Ammonium hydroxide' and 'Carbonic Acid', by any chance?
Formic Acid and hemoglobin are going to be a bit unusual; somehow they seem a bit out of place in this list. I should point out that copper, like iron, comes in more than one 'flavor'; in this case, you can have Copper(I) and Copper(II), which would change the relative number of 'oxides' and 'chlorides' to the 'copper's in the formula. Your textbook (or wikipedia) should give you the information you require.