Explain what interaction is in the hydrogen fluoride (hf) and hydrogen chlori de (h ci) which one do you expect to have a higher boiling temperature? why? what type(s) of bonding would be expected for each of the following materials: ice, copper dioxide (cuo2), steel, silicon elastomer, and tungsten? and why?

Explanation:  

Part A

Boiling point of HF is much higher as compared to the boiling point of HCl.

Reason:

The strongest inter molecular hydrogen bonding exist between HF molecules This is due to highly electronegative Fluorine atom.

Part B

The type of bonding present in the given compounds are:

1. Ice  

The water molecules in ice are linked to each other through intermolecular hydrogen bonding due to the presence of electronegative oxygen atom that is attached to hydrogen atom.

2. Copper dioxide

In  Copper dioxide, Copper and oxide ions are linked to each other via electrostatic force of attraction due to the presence of electronegative Oxygen atom and electropositive Cu atom.

Therefore, ionic bond is present in it.

3. Steel

In steel, metal and negatively charged electrons are linked to each other, thus giving rise to metallic bond between steel molecules.

4. Silicon elastomer

In silicon elastomer, Silicon atom is linked to other atom via covalent bonds due to sharing of electrons.

5. Tungsten

In the case of tungsten also, atoms are bonded to each other via metallic bond.

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.