39 which formula represents a molecule with the most polar bond? (1) co (3) hi
(2) no (4) hcl

(1) CO

Explanation: A molecule is said to be polar when it has atoms with different electronegativities. The more is the difference in electronegativity, the more polar is the bond.

Electronegativity of carbon and oxygen are 2.5 and 3.5 respectively. Thus difference is (3.5-2.5)=1.0.

Electronegativity of hydrogen and Iodine are 2.1 and 2.7 respectively. Thus difference is (2.7-2.1)=0.6.

Electronegativity of nitrogen and oxygen are 3.0 and 3.5 respectively. Thus difference is (3.5-3.0)=0.5.

Electronegativity of hydrogen and chlorine are 2.1 and 3.0 respectively. Thus difference is (3.0-2.1)=0.9.

Thus as the highest difference of electronegativity is among carbon and oxygen, CO is the most polar.

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.