What does below chemistry rebus means?

What can you deduce from the following BrainBat?

CRY
LMKI

A man dies of old age on his 25 birthday. How is this possible?

What does below Rebus say?

XLR8

What does this mean?

CCCCCCC

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

You can hear me, but you can't touch or see me.

What am I?

I can write cow in 13 letters.

Can You?

The centre of the third figure is empty. What digit should fit inside?

French Police inspects a room where there are no windows, no doors, no tables and is almost empty expect there is just a puddle of water. They found a dead man who obviously hung herself from the ceiling, but they are not able to figure out how this had happened.

John and Jacob entered the crime scene and easily able to solve the case.

How did the man die?