Convert the temperatures 45.0â°c and 90.0â°c, and the difference between them, to degrees fahrenheit.

Answer : The difference between the temperature is,

Explanation :

The conversion used for the temperature from degree centigrade to Fahrenheit is:

where,

= temperature in Fahrenheit

= temperature in centigrade

First we have to convert the temperature from degree centigrade into Fahrenheit.

Conversion of into

Conversion of into

Now we have to determine the difference between the temperature.

Therefore, the difference between the temperature is,

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.