[Ethan1122664]

How much KCN can be produced by heating 10 grams of 99% pure KSCN at 500 degrees Celsius?

[Borek]

Please read the forum rules, you have to show your efforts at answering the question to receive help.

Technically you should start by writing the reaction equation, after that calculations are rather easy.

That being said I am not convinced the obvious reaction that you can find here and there by googling is correct, my bet is that the process of thermal decomposition of KSCN is not something that follows a well defined, stoichiometric path, which makes the result of simple calculations unrealistic.