Which molecule combination could hydrogen bond?
H₂ and F₂
PH₃ and NO₂
NH₃ and HCl
NH₃ and H₂O
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Ответ:
NH₃ and HCl
Explanation:
Ответ:
The color of a star is decided by the surface temperature of the star and the temperature of a star depends on the size of star.
The smaller stars have low temperature and they are usually red (Proxima Centauri - red dwarf star).
The massive stars have higher temperature and they are usually blue (for exaple Zeta Puppis - Blue supergiant star).