<span>surface tension of water compare with the surface tensions of most other liquids is higher because hydrogen bonding between water molecules is strong
3)</span>The bonds between adjacent water molecules are called<span> hydrogen </span>bonds<span>. The strength of a single hydrogen </span>bond<span> is only 5 percent that of a covalent </span>bond<span>;
2)</span><span>tetrahedral </span>
Answer : The formal charge on central Cl atom is -1.
Explanation :
The given molecule is,
First we have to determine the total number of valence electrons in,
As we know, chlorine has 7 valence electrons.
Total number of valence electrons in = 3(7) + 1 = 22 electrons
Electrons used in bonding pair = 4
Electrons used as lone pair = 22 - 4 = 18
Now we have to calculate the formal charge on central Cl atom.
- Formal charge = Number of valence electrons of a central atom - (2 × Number of lone pairs) - Number of bond pairs
Formal charge on central Cl atom = 7 - (2 × 3) -2 = -1
Therefore, the formal charge on central Cl atom is -1.
The lewis-dot structure of is shown below.
Molar mass NaCl = 58.44 g/mol
Therefore:
1 mole ---------- 58.44 g
? mole ---------- 72.70 g
72.70 x 1 / 58.44 => 1.244 moles of NaCl
Answer: b should be the answer just took this test
Explanation: