What does below chemistry rebus means?

The Little ant seems to be always confused. Do you know why?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Can you find the 09 errors in the picture below?

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?

Which five letter word can be added at the end of below word to form a
valid word?

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In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?