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Why does Hydrogen selenide have a higher boiling point than hydrogen sulfide?

In my A-Level book there is a multiple choice question, which states that this is the true statement. It doesn't explain why, can anyone please help?

Thanks in advance.
Original post by BrainJuice
In my A-Level book there is a multiple choice question, which states that this is the true statement. It doesn't explain why, can anyone please help?

Thanks in advance.


Greater London dispersion forces due to larger relative mass.

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