Answer:
It helps creatures to walk on the water.
Explanation:
<span>0.0797 g
Looking at the formula, 1 mole of KIO3 and 5 moles of KI will react and produce moles of iodine molecules or 6 moles of iodine atoms. So first, determine the number of moles of KIO3 and KI provided
moles KIO3 = 0.0121 * 0.097 = 0.0011737 mol
moles KI = 0.0308 * 0.017 = 0.0005236 mol
The limiting reactant is KI at 0.0005236 mol so divide by 5 and multiply by 6 to get the number of moles of iodine atoms.
0.0005236 / 5 * 6 = 0.00062832 mol
Lookup the atomic weight of iodine which is 126.90447
And multiply that by the number of moles of iodine produced
126.90447 g/mol * 0.00062832 mol = 0.079736617 g
Rounding to 4 decimal places gives 0.0797 g</span>
Answer: More the electronegativity difference, more polar will be the bond.
Explanation: The electronegativity is defined as the tendency of an element to attract a shared pair of electron towards itself in a chemical bond.
Polarity of the bond is described by the electronegativity difference between the elements making the bond. More the electronegativity difference, more polar is the bond.
The electronegativities of oxygen, hydrogen and nitrogen are:
For Oxygen : 3.44
For Hydrogen : 2.1
For Nitrogen : 3.04
In 
Electronegativity difference between oxygen and hydrogen = (3.44 - 2.1) = 1.34
In 
Electronegativity difference between nitrogen and hydrogen = (3.04 - 2.1) = 0.94
As, the Electronegativity difference between oxygen and hydrogen is more, therefore water molecule is more polar.