[Macg73]

Need to write a balanced chemical equation for the reaction between hydrogen selenide and tin. I know that the hydrogen selenide decomposes producing solid tin selenide and hydrogen gas but how would I balance that in the equation. Any help gratefully recieved

[Alberto_Kravina]

Start with the two reactants: H₂Se and Sn

[Macg73]

ok  thanks, would that make it     H2Se3 + Sn = SnSe3 + H2?

[constant thinker]

Looks good to me.

Edit: Almost good, billnotgatez has a good point.

[billnotgatez]

I think you need some adjustments to your formula

On the Periodic Table
Sn is in the same column as C
Se is in the same column as O

Posted by: Alberto_Kravina
Start with the two reactants: H₂Se and Sn

[Macg73]

Ok, thanks for all your help