Explanation:
Alkanes are the simple hydrocarbons that have only carbon and hydrogen atoms attached to each other through single bonds.
General chemical formula of an alkane is
, where n is any integer.
For example, if n = 5 then formula of the alkane will be as follows.

= 
= 
A suffix "-ane" is added in the name of an alkane. So, an alkane with five carbon atoms will be known as pentane.
Answer:
D. Greenhouse Gas
Explanation:
I read about this earlier today
Answer:
B. burning a piece of wood
Explanation:
The Chemical Would Be The Air Coming From The Wood While Burning It
Tell Me If Im Correct
Answer:
heating point for water - 100°