What is the formula for:

[andymac1991]

1.) Ammonium Nitrate

2.) Barium Sulphate

3.) Barium Nitrate

4.) Barium Hydroxide

5.) Ammonium Sluphate?

[gen2]

There is more satisfaction from answering your own homework questions. Then try Google if your science books are no help.

[brachiopod]

Barium, (if you cared to look at your Periodic Table), is a Group II metal, so has a valency of +2.

Sulphate (SO4 ^2-) ions have a valency of -2.

Hydroxide is OH- (ie -1)

Nitrate (NO3-)

Ammonium ion (NH4+) is positive (like a metal ion)

Charges and values must balance. Try and work it out for yourself, you might actually learn, understand and remember something - rather than getting someone to do your homework for you.

[gammaray]

NH4 NO3

BaSO4

Ba(NO3)2

Ba(OH)2

(NH4)2 SO4

The web site www.physichem.ox.ac.uk (click on MSDS sheets) has all the stuff you might need.