Answer:
6
Explanation:
You will see H6 and the H stands for helium and the 6 is how many of that atom is there
1. Calcium hydrogen phosphate
2. Iron(II) Hydrogen Sulfate
3. Calcium hydroxide
4. Aluminum chloride hydroxide
What happens to temperature as a substance melts and heat energy is used to break the connections between molecules, until all melting is complete?.
Answer : Stays the same
Explanation:
Hybridization of O in 
So, water molecule has four hybrid orbitals.
Two hybrid orbitals form 2 sigma bond with two H atoms.
Remaining two hybrid orbitals are occupied by two lone pairs.
Because of lone pair-lone pair repulsion, shape of
becomes bent.
Water molecule is polar because of difference in eletronegativities of O and H.
O is more electronegative as comapared to hydrogen. So bonding electrons get attracted towards O atom which results in the development of partial negative charge on O atom and partial positive charge on H atoms.
Because of development of partial negative and partial positive charge, water molecule becomes polar.