4. In which of these graphs are both runners moving at the same speed? 40
40
A
B.
30
30
Distance from starting line (metes)
Distance from starting line (metes)
20
20
10
10
0
0
1
2
1
2
Time (seconds)
3
Time (seconds)
40
40
C
D
30
30
Distance from starting line (meters)
Distance from starting line (metes)
20
200
10
10
0
1
2
3
Time (seconds)
1
3
Time (seconds
O A. graph A.
B. graph B
C. graph C
O D. graph D
I’m pp

Answer is: (2) molecular polarities.

Hexane is alkane (acyclic saturated hydrocarbon, carbon-carbon bonds are single) of six carbon atoms.

Hexane (C₆H₁₄) is nonpolar molecule.

Water (H₂O) is polar molecule.

Bonds between oxygen and hydrogen atoms are polar covalent chemical bonds.

Water is polar because of the bent shape of the molecule.  

Oxygen atom in water molecule has sp3 hybridization. The bond angle between the two hydrogen atoms is approximately 104.45°.