Question

why does a candle flame go out when u blow on it?
( HINT: It is a wax vapour that burns.)

Answer 1

Carbon dioxide molecules are heavier than air. Because of this, they push the oxygen and other molecules in the airout of the way as they sinks down over the flame and candle. when oxygen ispushed away from the Wick, it can't react with the wax anymore. ... Blowinto the flame and you blow away the gas that is burning.

Answer 2

REASON-1:
We take in Oxygen through nostrils of nose and leave out Carbondioxide through nose and mouth. And when we blow out air, Carbondioxide comes out. We already know that Carbondioxide puts off fire. So it puts off fire.
REASON-2:
Carbondioxide is also heavier than air. They pushes out O2 molecules from the air which is nearer to flame. And CO2 molecules sink on flame of candle.So it puts off fire when air is blown.