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The boiling points at atmospheric pressure of
P \( \mathrm{HF}, \mathrm{H}_{2} \mathrm{~S}, \mathrm{NH}_{3} \) can be arranged in the following

W order:
(1) \( \mathrm{HF}\mathrm{NH}_{3}\mathrm{H}_{2} \mathrm{~S} \)
(2) \( \mathrm{HF}\mathrm{H}_{2} \mathrm{~S}\mathrm{NH}_{3} \)
(3) \( \mathrm{HF}\mathrm{H}_{2} \mathrm{~S}\mathrm{NH}_{3} \)
(4) \( \mathrm{HF}\mathrm{NH}_{3}\mathrm{H}_{2} \mathrm{~S} \)
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