Answer:
changing shape under heat and pressuremelting completely, then cooling
Explanation:
4. Static, sliding,rolling,and fluid friction
Answer:
The Lewis structures are shown in the figure
Explanation:
The lewis structure will be drawn using following steps
i) we will calculate the total number of valence electrons in the molecule
ii) will assign one bond (two electrons in between two atoms)
iii) then distribute the rest of the valence electrons as lone pair or shared pair based on completion of octet.
The structure of each molecule is given in the figure.
Valence electrons:

V.E = 5 +(2)6-1=16

V.E =5 +(2)6+7=24
<span>Phosphorus pentoxide is a chemical compound with molecular formula P4O10 This white crystalline solid is the anhydride of phosphoric acid. It is a powerful desiccant and dehydrating agent.</span>