They expect the Universe to continue expanding. Right now, the evidence is that the expansion is speeding up. They also expect entropy to continue increasing, so in the distant future, there will not be any free energy left to support life, for example.
Answer:
Sublimation occurs in solids with vapor pressures that exceed atmospheric pressure at or near room temperature.
Explanation:
Water is H2O but I'm not sure about solids.
Answer:
<span>The strongest intermolecular interactions between hydrogen fluoride (hf) molecules arise from Hydrogen Bonding.
Explanation:
Hydrogen Bond interactions are considered the strongest intermolecular interactions among molecules. These interactions are found between Hydrogen atom of one molecule bonded to most electronegative atoms (i.e F, O, N) and the most electronegative atoms of neighbor molecule.
In case of HF, fluorine has the greatest electronegativity of 4, so the hydrogen bonded to Fluorine becomes partial positive and makes Hydrogen bond with Fluorine atom of </span>neighbor HF molecule.<span />
I don't know exactly what you are learning, but i know that chemistry involves the practice of mixing chemicals together to see what kind of reaction they make, if they make a reaction at all.
